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Nordberg E, Ekerljung L, Sahlberg SH, Carlsson J, Lennartsson J, Glimelius B. Effects of an EGFR-binding affibody molecule on intracellular signaling pathways. Int J Oncol 2010; 36:967-72. [PMID: 20198342 DOI: 10.3892/ijo_00000576] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Effects on intracellular signaling were studied in cells treated with the affibody molecule (ZEGFR:955)2 that targets the epithelial growth factor receptor (EGFR). EGFR is overexpressed in many types of cancers and plays a fundamental role in cell signaling and it is of interest to find targeting agents capable of blocking the receptor. The clinically approved antibody cetuximab (Erbitux) and the natural ligand EGF were included as reference molecules. Two EGFR-rich cell lines, A-431 and U-343, were exposed to the three targeting agents and lysed. The cell lysates were immunoprecipitated with the receptors, or directly separated by SDS-Page. Autophosphorylation of the receptors and phosphorylation of the downstream signaling proteins Erk and Akt, were evaluated by Western blotting. Although the three different agents compete for the same binding site on EGFR, they influenced the signaling differently. The affibody molecule did not induce autophosphorylation of EGFR or any other receptor in the EGFR-family but, in spite of this, induced phosphorylation of Erk in both cell lines and Akt in the A-431 cells. Thus, the results suggest that the signaling pattern induced by (ZEGFR:955)2 is only partly similar to that induced by cetuximab. This makes the affibody molecule a potentially interesting alternative to cetuximab for EGFR-targeted therapy since it might give different therapy-related effects on tumor cells and different side effects on normal tissues.
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Affiliation(s)
- E Nordberg
- Biomedical Radiation Sciences, Department of Oncology, Radiology and Clinical Immunology, Rudbeck Laboratory, Uppsala University, SE-751 85 Uppsala, Sweden
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Nordberg E, Orlova A, Friedman M, Tolmachev V, Ståhl S, Nilsson FY, Glimelius B, Carlsson J. In vivo and in vitro uptake of 111In, delivered with the affibody molecule (ZEGFR:955)2, in EGFR expressing tumour cells. Oncol Rep 2008; 19:853-7. [PMID: 18357367 DOI: 10.3892/or.19.4.853] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The epidermal growth factor receptor, EGFR, is overexpressed in many carcinomas. Targeting this receptor with radionuclides is important for imaging and therapy applications in nuclear medicine. We investigated the in vitro and in vivo properties of a new high affinity EGFR binding affibody molecule, (ZEGFR:955)2, when conjugated with CHX-A''-DTPA and labelled with 111In. The binding time patterns and retention studies were performed using cultured squamous carcinoma A431 cells that overexpress EGFR. In the in vivo studies, female BALB/c nu/nu mice carrying tumours from xenografted A431 cells were used. The in vitro studies showed EGFR specific binding, high uptake and good retention of 111In when delivered as [111In](ZEGFR:955)2. The retention after 72 h of incubation was 38.0+/-1.15% of the initial level. The biodistribution study showed a tumour specific 111In uptake of 3.8+/-1.4% of injected dose per gram tumour tissue 4 h post-injection. The tumour to blood ratio was 9.1 and the tumours could easily be visualized with a gamma camera at this time-point. 111In delivered with [111In](ZEGFR:955)2 gave an EGFR specific uptake and the results indicated that the (ZEGFR:955)2 affibody molecule is a candidate for radionuclide-based tumour imaging. Potential therapy applications are discussed.
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Affiliation(s)
- E Nordberg
- Biomedical Radiation Sciences, Department of Oncology, Radiology and Clinical Immunology, Rudbeck Laboratory, SE-751 85 Uppsala, Sweden.
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Friedman M, Nordberg E, Höidén-Guthenberg I, Brismar H, Adams GP, Nilsson FY, Carlsson J, Ståhl S. Phage display selection of Affibody molecules with specific binding to the extracellular domain of the epidermal growth factor receptor. Protein Eng Des Sel 2007; 20:189-99. [PMID: 17452435 DOI: 10.1093/protein/gzm011] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Affibody molecules specific for the epidermal growth factor receptor (EGFR) have been selected by phage display technology from a combinatorial protein library based on the 58-residue, protein A-derived Z domain. EGFR is overexpressed in various malignancies and is frequently associated with poor patient prognosis, and the information provided by targeting this receptor could facilitate both patient diagnostics and treatment. Three selected Affibody variants were shown to selectively bind to the extracellular domain of EGFR (EGFR-ECD). Kinetic biosensor analysis revealed that the three monomeric Affibody molecules bound with similar affinity, ranging from 130 to 185 nM. Head-to-tail dimers of the Affibody molecules were compared for their binding to recombinant EGFR-ECD in biosensor analysis and in human epithelial cancer A431 cells. Although the dimeric Affibody variants were found to bind in a range of 25-50 nM affinities in biosensor analysis, they were found to be low nanomolar binders in the cellular assays. Competition assays using radiolabeled Affibody dimers confirmed specific EGFR-binding and demonstrated that the three Affibody molecules competed for the same epitope. Immunofluorescence microscopy demonstrated that the selected Affibody dimers were initially binding to EGFR at the cell surface of A431, and confocal microscopy analysis showed that the Affibody dimers could thereafter be internalized. The potential use of the described Affibody molecules as targeting agents for radionuclide based imaging applications in various carcinomas is discussed.
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Affiliation(s)
- M Friedman
- Department of Molecular Biotechnology, AlbaNova University Center, Kungl Tekniska Högskolan, SE-106 91 Stockholm, Sweden
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Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Bukin K, Dambasuren E, Mountain R, Moneti GC, Muramatsu H, Nandakumar R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Berkelman K, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Pivarski J, Richichi SJ, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Wilksen T, Warburton A, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Benslama K, Eisenstein BI, Gollin GD, Karliner I, Lowrey N, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Gong DT, Kubota Y, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ahmed S, Alam MS, Ernst J, Jian L, Saleem M, Wappler F, Arms K, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, von Toerne E, Zoeller MM, Severini H, Skubic P, Dytman SA, Mueller JA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ. First observation of the exclusive decays Λc+→Λπ+π+π−π0and Λc+→Λωπ+. Int J Clin Exp Med 2003. [DOI: 10.1103/physrevd.67.012001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Wilksen T, Zoeller MM, Muramatsu H, Richichi SJ, Severini H, Skubic P, Dytman SA, Mueller JA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Khroustalev K, Moneti GC, Mountain R, Nandakumar R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Xu Z, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Masek G, Paar HP, Mahapatra R, Nelson HN, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X. Measurements of inclusive B-->psi production. Phys Rev Lett 2002; 89:282001. [PMID: 12513135 DOI: 10.1103/physrevlett.89.282001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2002] [Indexed: 05/24/2023]
Abstract
Using the combined CLEO II and CLEO II.V data sets of 9.1 fb(-1) at the Upsilon(4S), we measure properties of psi mesons produced directly from decays of the B meson, where "B" denotes an admixture of B+, B-, B0, and B;(0), and "psi" denotes either J/psi(1S) or psi(2S). We report first measurements of psi polarization in B-->psi(direct)X: alpha(psi(1S))=-0.30(+0.07)(-0.06)+/-0.04 and alpha(psi(2S))=-0.45(+0.22)(-0.19)+/-0.04. We also report improved measurements of the momentum distributions of psi produced directly from B decays, correcting for measurement smearing. Finally, we report measurements of the inclusive branching fraction for B-->psiX and B-->chi(c1)X.
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Affiliation(s)
- S Anderson
- University of Minnesota, Minneapolis, Minnesota 55455, USA
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6
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Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, Von Toerne E, Wilksen T, Zoeller MM, Muramatsu H, Richichi SJ, Severini H, Skubic P, Dytman SA, Mueller JA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Stroynowski R, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Khroustalev K, Mountain R, Nandakumar R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Mahapatra R, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Berkelman K, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Brandenburg G, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F. Observation of B-->K(0)(S)pi(+)pi(-) and Evidence for B-->K(*+/-)pi(-/+). Phys Rev Lett 2002; 89:251801. [PMID: 12484873 DOI: 10.1103/physrevlett.89.251801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2002] [Indexed: 05/24/2023]
Abstract
We report on a search for charmless hadronic B decays to the three-body final states K(0)(S)h(+)pi(-), K(+)h(-)pi(0), K(0)(S)h(+)pi(0) (h(+/-) denotes a charged pion or kaon), and their charge conjugates, using 13.5 fb(-1) of integrated luminosity produced near sqrt[s]=10.6 GeV, and collected with the CLEO detector. We observe the decay B-->K0pi(+)pi(-) with a branching fraction (50(+10)(-9)(stat.)+/-7(syst.))x10(-6) and the decay B-->K(*+)(892)pi(-) with a branching fraction (16(+6)(-5)(stat.)+/-2(syst.))x10(-6).
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Affiliation(s)
- E Eckhart
- Ohio State University, Columbus, Ohio 43210
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7
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Muramatsu H, Richichi SJ, Severini H, Skubic P, Dytman SA, Mueller JA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Khroustalev K, Mountain R, Nandakumar R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Asner DM, Mahapatra R, Nelson HN, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Brandenburg G, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, Von Toerne E, Wilksen T, Zoeller MM. Dalitz analysis of D0-->K(0)(S)pi(+)pi(-). Phys Rev Lett 2002; 89:251802. [PMID: 12484874 DOI: 10.1103/physrevlett.89.251802] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2002] [Indexed: 05/24/2023]
Abstract
In e(+)e(-) collisions using the CLEO detector, we have studied the decay of the D0 to the final state K(0)(S)pi(+)pi(-) with the initial flavor of the D0 tagged by the decay D(*+)-->D0pi(+). We use the Dalitz technique to measure the resonant substructure in this final state and clearly observe ten different contributions by fitting for their amplitudes and relative phases. We observe a K(*)(892)(+)pi(-) component which arises from doubly Cabibbo suppressed decays or D0-D0; mixing.
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Brandenburg G, Ershov A, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, Von Toerne E, Wilksen T, Zoeller MM, Richichi SJ, Severini H, Skubic P, Dytman SA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Ye J, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Mountain R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Xu Z, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Masek G, Paar HP, Mahapatra R, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Bebek C, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Stoeck H, Yelton J. Measurement of B(D+-->K(*0)l(+)nu(l)). Phys Rev Lett 2002; 89:222001. [PMID: 12485061 DOI: 10.1103/physrevlett.89.222001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/12/2002] [Indexed: 05/24/2023]
Abstract
Using 13.53 fb(-1) of CLEO data, we have measured the ratios of the branching fractions R(+)(e),R(+)(mu) and the combined branching fraction ratio R(+)(l), defined by R(+)(l)=[B(D+-->K(*0)l(+)nu(l))]/[B(D+-->K-pi(+)pi(+))]. We find R(+)(e)=0.74+/-0.04+/-0.05, R(+)(mu)=0.72+/-0.10+/-0.05, and R(+)(l)=0.74+/-0.04+/-0.05, where the first and second errors are statistical and systematic, respectively. The known branching fraction B(D+-->K-pi(+)pi(+)) leads to B(D+-->K(*0)e(+)nu(e))=(6.7+/-0.4+/-0.5+/-0.4)%, B(D+-->K(*0)mu(+)nu(mu))=(6.5+/-0.9+/-0.5+/-0.4)%, and B(D+-->K(*0)l(+)nu(l))=(6.7+/-0.4+/-0.5+/-0.4)%, where the third error is due to the uncertainty in B(D+-->K-pi(+)pi(+)).
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Affiliation(s)
- G Brandenburg
- Harvard University, Cambridge, Massachusetts 02138, USA
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Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Wilksen T, Zoeller MM, Muramatsu H, Richichi SJ, Severini H, Skubic P, Dytman SA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Mountain R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Xu Z, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Masek G, Paar HP, Mahapatra R, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW. Observation of the decay Omega(0)(c)-->Omega(-)e(+)nu(e). Phys Rev Lett 2002; 89:171803. [PMID: 12398660 DOI: 10.1103/physrevlett.89.171803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2002] [Indexed: 05/24/2023]
Abstract
Using the CLEO detector at the Cornell Electron Storage Ring we have observed the Omega(0)(c) (css ground state) in the decay Omega(0)(c)-->Omega(-)e(+)nu(e). We find a signal of 11.4+/-3.8(stat) events. The probability that we have observed a background fluctuation is 7.6x10(-5). We measure B(Omega(0)(c)-->Omega(-)e(+)nu(e)).sigma(e(+)e(-)-->Omega(0)(c)X)=(42.2+/-14.1(stat)+/-5.7(syst)) fb and R=[Gamma(Omega(0)(c)-->Omega(-)pi(+))]/[Gamma(Omega(0)(c)-->Omega(-)enu(e))]=00.41+/-0.19(stat)+/-0.04(syst). This is the first statistically significant observation of an individual decay mode of the Omega(0)(c) in e(+)e(-) annihilation and the first example of a baryon decaying via beta emission, where no quarks from the first generation participate in the reaction.
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Affiliation(s)
- R Ammar
- University of Kansas, Lawrence, Kansas 66045, USA
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10
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Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Stroynowski R, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Khroustalev K, Mountain R, Nandakumar R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Mahapatra R, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Berkelman K, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Brandenburg G, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Arms K, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Morris C, Pedlar TK, Thayer JB, von Toerne E, Wilksen T, Zoeller MM, Muramatsu H, Richichi SJ, Severini H, Skubic P, Dytman SA, Mueller JA, Nam S, Savinov V. Search for neutrinolessτdecays involving theKS0meson. Int J Clin Exp Med 2002. [DOI: 10.1103/physrevd.66.071101] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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11
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Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Wilksen T, Zoeller MM, Richichi SJ, Severini H, Skubic P, Dytman SA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Ye J, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Mountain R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Xu Z, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Masek G, Paar HP, Mahapatra R. Improved measurement of /V(cb)/ using B-->D*l nu decays. Phys Rev Lett 2002; 89:081803. [PMID: 12190458 DOI: 10.1103/physrevlett.89.081803] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2002] [Indexed: 05/23/2023]
Abstract
We determine the weak coupling /V(cb)/ between the b and c quarks using a sample of 3 x 10(6) BB; events in the CLEO detector at the Cornell Electron Storage Ring. We determine the yield of reconstructed B-->D*l nu; decays as a function of w, the boost of the D* in the B rest frame, and from this we obtain the differential decay rate d Gamma/dw. By extrapolating d Gamma/dw to w=1, the kinematic end point at which the D* is at rest relative to the B, we extract the product /V(cb)/F(1), where F(1) is the form factor at w=1. Combined with theoretical results for F(1) we determine /V(cb)/=0.0469+/-0.0014(stat)+/-0.0020(syst)+/-0.0018(theor).
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Affiliation(s)
- R A Briere
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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12
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Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Masek G, Paar HP, Mahapatra R, Morrison RJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Bebek C, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Prescott C, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, Von Toerne E, Wilksen T, Zoeller MM, Richichi SJ, Severini H, Skubic P, Dytman SA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Ye J, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Mountain R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Xu Z, Bonvicini G, Cinabro D, Dubrovin M, McGee S. Improved measurement of Vub with inclusive semileptonic B decays. Phys Rev Lett 2002; 88:231803. [PMID: 12059353 DOI: 10.1103/physrevlett.88.231803] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/08/2002] [Indexed: 05/23/2023]
Abstract
We report a new measurement of the Cabibbo-Kobayashi-Maskawa parameter Vub made with a sample of 9.7 x 10(6) BB- events collected with the CLEO II detector. Using heavy quark theory, we combine the observed yield of leptons from semileptonic B decay in the end-point momentum interval 2.2-2.6 GeV/c with recent CLEO II data on B-->X(s)gamma to find Vub = (4.08+/-0.34+/-0.44+/-0.16+/-0.24)x10(-3), where the first two uncertainties are experimental and the last two are from theory.
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Affiliation(s)
- A Bornheim
- California Institute of Technology, Pasadena, California 91125, USA
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13
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Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Masek G, Paar HP, Mahapatra R, Morrison RJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Bebek C, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Prescott C, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Wilksen T, Zoeller MM, Richichi SJ, Severini H, Skubic P, Dytman SA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Ye J, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Mountain R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Xu Z. Search for CP violation in tau--> K(pi)nu(tau) decays. Phys Rev Lett 2002; 88:111803. [PMID: 11909396 DOI: 10.1103/physrevlett.88.111803] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2001] [Indexed: 05/23/2023]
Abstract
We search and find no evidence for CP violation in tau decays into the K(pi)nu(tau) final state. We provide limits on the imaginary part of the coupling constant Lambda describing a relative contribution of the CP violating processes with respect to the standard model to be -0.172<Im(Lambda)<0.067 at 90% C.L.
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Affiliation(s)
- G Bonvicini
- Wayne State University, Detroit, Michigan 48202, USA
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14
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Mahapatra R, Nelson HN, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Bebek C, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Wilksen T, Zoeller MM, Muramatsu H, Richichi SJ, Severini H, Skubic P, Dytman SA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Ye J, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Moneti GC, Mountain R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Xu Z, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Masek G, Paar HP. Observation of exclusive B --> D(*)K(*-) decays. Phys Rev Lett 2002; 88:101803. [PMID: 11909343 DOI: 10.1103/physrevlett.88.101803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2001] [Indexed: 05/23/2023]
Abstract
We report the first observation of the exclusive decays B-->D((*))K(*-), using 9.66 x 10(6) BB pairs collected at the Upsilon(4S) with the CLEO detector. We measure the following branching fractions: B(B--->D(0)K(*-)) = (6.1+/-1.6+/-1.7)x10(-4), B(B(0)-->D(+)K(*-)) = (3.7+/-1.5+/-1.0)x10(-4), B(B(0)-->D(*+)K(*-)) = (3.8+/-1.3+/-0.8)x10(-4), and B(B--->D(*0)K(*-)) = (7.7+/-2.2+/-2.6)x10(-4). The B-->D(*)K(*-) branching ratios are the averages of those corresponding to the 00 and 11 helicity states. The errors shown are statistical and systematic, respectively.
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Affiliation(s)
- R Mahapatra
- University of California, Santa Barbara, California 93106, USA
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15
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Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Ye J, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Mountain R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Danko I, Xu Z, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Masek G, Paar HP, Mahapatra R, Morrison RJ, Nelson HN, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Adam NE, Alexander JP, Bebek C, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Prescott C, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gollin GD, Hans RM, Karliner I, Lowrey N, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Ammar R, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Li SZ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Saleem M, Wappler F, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Dytman SA, Nam S, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Park CS, Park W, Thorndike EH. Observation of B(0) --> D0pi(0) and B(0) -->D(*0)pi(0). Phys Rev Lett 2002; 88:062001. [PMID: 11863797 DOI: 10.1103/physrevlett.88.062001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/22/2001] [Indexed: 05/23/2023]
Abstract
We have studied the color-suppressed hadronic decays of neutral B mesons into the final states D*0pi(0). Using 9.67 x 10(6) BB pairs collected with the CLEO detector, we observe the decays B( 0) --> D0pi(0) and B( 0) -->D(*0)pi(0) with the branching fractions BB( 0) -->D0pi(0)) = (2.74(+0.36)(-0.32) +/- 0.55)x10(-4) and BB( 0) -->D(*0)pi(0)) = (2.20(+0.59)(-0.52) +/- 0.79)x10(-4). The first error is statistical and the second systematic. The statistical significance of the D0pi(0) signal is 12.1sigma ( 5.9sigma for D(*0)pi(0)). Utilizing the B( 0) -->D*0)pi(0) branching fractions we determine the strong phases delta(I,D(*)) between isospin 1/2 and 3/2 amplitudes in the Dpi and D*pi final states to be cosdelta(I,D) = 0.89 +/-0.08 and cosdelta(I,D*) = 0.89 +/- 0.08, respectively.
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Affiliation(s)
- T E Coan
- Southern Methodist University, Dallas, Texas 75275, USA
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Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z. Search for charmless B --> VV decays. Phys Rev Lett 2002; 88:021802. [PMID: 11801004 DOI: 10.1103/physrevlett.88.021802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2001] [Indexed: 05/23/2023]
Abstract
We have studied two-body charmless decays of the B meson into the final states rho(0)rho(0), K(*0)rho(0), K(*0)K(*0), K(*0)K(*0), K(*+)rho(0), K(*+)K(*0), and K(*+)K(*-) using only decay modes with charged daughter particles. Using 9.7x10(6) BB pairs collected with the CLEO detector, we place 90% confidence level upper limits on the branching fractions (1.4-14.1)x10(-5), depending on final state and polarization.
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Affiliation(s)
- R Godang
- Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA
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17
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Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ. Search for the familon via B(+/-) --> pi+/-X(0), B(+/-) --> K(+/-)X(0), and B(0) --> K(0)(S)X(0) decays. Phys Rev Lett 2001; 87:271801. [PMID: 11800872 DOI: 10.1103/physrevlett.87.271801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2001] [Indexed: 05/23/2023]
Abstract
We have searched for the two-body decay of the B meson to a light pseudoscalar meson h = pi(+/-),K+/-,K(0)(S) and a massless neutral feebly interacting particle X(0) such as the familon, the Nambu-Goldstone boson associated with a spontaneously broken global family symmetry. We find no significant signal by analyzing a data sample containing 9.7x10(6) BBbar mesons collected with the CLEO detector at the Cornell Electron Storage Ring, and set 90% C.L. upper limits italicB(B(+/-) --> h(+/-)X(0)) = 4.9x10(-5) and italicB(B(0) --> K(0)(S)X(0)) = 5.3x10(-5). These limits correspond to a lower bound of approximately 10(8) GeV on the family symmetry breaking scale with vector coupling involving the third generation of quarks.
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Affiliation(s)
- R Ammar
- University of Kansas, Lawrence, Kansas 66045, USA
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18
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Cronin-Hennessy D, Lyon AL, Roberts S, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP. Hadronic mass moments in inclusive semileptonic B meson decays. Phys Rev Lett 2001; 87:251808. [PMID: 11736567 DOI: 10.1103/physrevlett.87.251808] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2001] [Indexed: 05/23/2023]
Abstract
We have measured the first and second moments of the hadronic mass-squared distribution in B-->X(c)l nu, for P(lepton)>1.5 GeV/c. We find <M(2)(X)-M macro(2)(D)> = 0.251+/-0.066 GeV(2), <(M(2)(X)-<M(2)(X)>)(2)> = 0.576+/-0.170 GeV(4), where M macro(D) is the spin-averaged D meson mass. From that first moment and the first moment of the photon energy spectrum in b-->s gamma, we find the heavy quark effective theory parameter lambda(1) (in the modified minimal subtraction renormalization scheme, to order 1/M(3)(B) and beta(0)alpha(2)(s)) to be -0.24+/-0.11 GeV(2). Using these first moments and the B semileptonic width, and assuming parton-hadron duality, we obtain absolute value of V(cb) = 0.0404+/-0.0013.
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Chen S, Hinson JW, Lee J, Miller DH, Pavlunin V, Shibata EI, Shipsey IP, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V. Branching fraction and photon energy spectrum for b --> s gamma. Phys Rev Lett 2001; 87:251807. [PMID: 11736566 DOI: 10.1103/physrevlett.87.251807] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2001] [Indexed: 05/23/2023]
Abstract
We have measured the branching fraction and photon energy spectrum for the radiative penguin process b-->s gamma. We find Beta(b-->s gamma) = (3.21+/-0.43+/-0.27(+0.18)(-0.10))x10(-4), where the errors are statistical, systematic, and from theory corrections. We obtain first and second moments of the photon energy spectrum above 2.0 GeV, <E( gamma)> = 2.346+/-0.032+/-0.011 GeV, and <E(2)(gamma)>-<E(gamma)>(2) = 0.0226+/-0.0066+/-0.0020 GeV(2), where the errors are statistical and systematic. From the first moment, we obtain (in the modified minimal subtraction renormalization scheme, to order 1/M(3)(B) and beta(0)alpha(2)(s)) the heavy quark effective theory parameter Lambda = 0.35+/-0.08+/-0.10 GeV.
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Affiliation(s)
- S Chen
- Purdue University, West Lafayette, Indiana 47907, USA
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20
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Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Coan TE, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, Jain V, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J. First measurement of gamma(D*(+)). Phys Rev Lett 2001; 87:251801. [PMID: 11736560 DOI: 10.1103/physrevlett.87.251801] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2001] [Indexed: 05/23/2023]
Abstract
We present the first measurement of the D*(+) width using 9/fb of e(+)e(-) data collected near the Upsilon(4S) resonance by the CLEO II.V detector. Our method uses advanced tracking techniques and a reconstruction method that takes advantage of the small vertical size of the Cornell Electron-positron Storage Ring beam spot to measure the energy release distribution from the D*(+)-->D(0)pi(+) decay. We find gamma(D*(+)) = 96+/-4 (stat)+/-22 (syst) keV. We also measure the energy release in the decay and compute Delta m identical with m(D*(+))-m(D(0)) = 145.412+/-0.002 (stat)+/-0.012 (syst) MeV/c(2).
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Affiliation(s)
- S Ahmed
- State University of New York at Albany, Albany, New York 12222, USA
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Nordberg E. Re: Medicine and literature: symposium in Nairobi on health-related fiction. East Afr Med J 2001; 78:677. [PMID: 12199452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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22
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Richichi SJ, Severini H, Skubic P, Dytman SA, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Maravin Y, Narsky I, Stroynowski R, Ye J, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Zhao H, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Pivarski J, Riley D, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Weinberger M, Athar SB, Avery P, Prescott C, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Benslama K, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Karliner I, Lowrey NA, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM. Search for the decay upsilon(1S) --> gammaeta('). Phys Rev Lett 2001; 87:141801. [PMID: 11580641 DOI: 10.1103/physrevlett.87.141801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2001] [Indexed: 05/23/2023]
Abstract
We report on a search for the radiative decay Upsilon(1S)-->gammaeta(') in 61.3 pb(-1) of data taken with the CLEO II detector at the Cornell Electron Storage Ring. Three decay chains were investigated, all involving eta(')-->pi(+)pi(-)eta, followed by eta-->gammagamma, eta-->pi(0)pi(0)pi(0), or eta-->pi(+)pi(-)pi(0). We find no candidate events in any of the three cases and set a combined upper limit of 1.6x10(-5) at 90% C.L., significantly smaller than the previous limit. We compare our result to other radiative Upsilon decays, to radiative J/psi decays, and to theoretical predictions.
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Affiliation(s)
- S J Richichi
- University of Oklahoma, Norman, Oklahoma 73019, USA
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23
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Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DYJ, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, O’Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IPJ, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H. Search for the decayB+→D*+KS0. Int J Clin Exp Med 2001. [DOI: 10.1103/physrevd.64.077501] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J. Rate measurement of D(0)-->K+pi(-)pi(0) and constraints on D(0) -- D(0) mixing. Phys Rev Lett 2001; 87:071802. [PMID: 11497880 DOI: 10.1103/physrevlett.87.071802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2001] [Indexed: 05/23/2023]
Abstract
We present an observation and time-integrated rate measurement of the decay D(0)-->K(+)pi(-)pi(0) produced in 9 fb(-1) of e(+)e(-) collisions near the Upsilon(4S) resonance. The signal is inconsistent with an upward fluctuation of the background by 4.9 standard deviations. We measured the time-integrated rate of D(0)-->K(+)pi(-)pi(0) normalized to the rate of D(0)-->K(+)pi(-)pi(0) to be 0.0043(+0.0011)(-0.0010) (stat)+/-0.0007 (syst). This decay can be produced by doubly Cabibbo-suppressed decays or by the D(0) evolving into a D(0) through mixing, followed by a Cabibbo-favored decay to K(+)pi(-)pi(0). We also found the CP asymmetry A = (9(+25)(-22))% be consistent with zero.
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Affiliation(s)
- G Brandenburg
- Harvard University, Cambridge, Massachusetts 02138, USA
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25
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Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Poling R, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Benslama K, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Skwarnicki T, Stone S, Wang JC, Wolf A, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Alexander JP, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Schwarthoff H, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R. Experimental investigation of the two-photon widths of the chi(c0) and the chi(c2) mesons. Phys Rev Lett 2001; 87:061801. [PMID: 11497821 DOI: 10.1103/physrevlett.87.061801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2001] [Indexed: 05/23/2023]
Abstract
Using 12.7 fb(-1) of data collected with the CLEO detector at CESR, we observed two-photon production of the cc states chi(c0) and chi(c2) in their decay to pi(+)pi(-)pi(+)pi(-). We measured gamma(gammagamma)(chi(c))xB(chi(c)-->pi(+)pi(-)pi(+)pi(-)) to be 75+/-13(stat)+/-8(syst) eV for the chi(c0) and 6.4+/-1.8(stat)+/-0.8(syst) eV for the chi(c2), implying gamma(gammagamma)(chi(c0)) = 3.76+/-0.65(stat)+/-0.41(syst)+/-1.69(br) keV and gamma(gammagamma)(chi(c2)) = 0.53+/-0.15(stat)+/-0.06(syst)+/-0.22(br) keV. Also, cancellation of dominant experimental and theoretical uncertainties permits a precise comparison of gamma(gammagamma)(chi(c0))/gamma(gammagamma)(chi(c2)), evaluated to be 7.4+/-2.4(stat)+/-0.5(syst)+/-0.9(br), with QCD-based predictions.
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Affiliation(s)
- B I Eisenstein
- University of Illinois, Urbana-Champaign, Illinois 61801
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26
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Nabembezi JS, Nordberg E. Surgical output in Kibaale district, Uganda. East Afr Med J 2001; 78:379-81. [PMID: 11957265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
BACKGROUND The output of major surgeries in eastern Africa is low and varies considerably between hospitals and regions. This study in rural Uganda relates surgical output to number of hospital beds, number of in-patient admissions, number of new out-patient visits, estimated catchment area population and number of doctors and nurses. This was to facilitate comparison between institutions and areas and to determine surgical resource needs. OBJECTIVES To describe the quantitative output of surgery in a Ugandan district and to demonstrate the use of standardised indicators for the purpose of comparison, monitoring, resource needs assessment and planning. DATA SOURCES Retrospective review and analysis of inpatient and outpatient records at Kagadi district hospital, Kibaale district, Western Uganda, the only hospital providing major surgery in the district. STUDY SELECTION Data on all recorded major and minor surgical operations in the hospital during two complete calendar years, 1996 and 1997. DATA SYNTHESIS In 1996 and 1997 there were 331 and 309 major operations performed respectively in Kagadi hospital, Kibaale district. This output corresponded to 3.3 and 3.1 per 100 beds; 270 and 270 per 1,000 in-patient admissions; 328 and 267 per year per 10,000 new out-patient visits; 166 and 155 per 100,000 catchment area population; 83 and 77 per doctor; 27.6 and 25.8 per nurse. Minor surgery output at the same hospital in 1996 and 1997 were 185 and 190 respectively. This corresponded to 183 and 164 per 10,000 new outpatient visits and 93 and 95 operations per 100,000 catchment area population. CONCLUSIONS The output of surgery in the district was very low in comparison with Europe and North America but within the range common in Eastern Africa. For planning and performance review purposes the most useful indicators are surgical output per 100 beds per year; per 1000 inpatient admissions; per doctor and per nurse per year because they measure workload against available resources. Output per 100,000 estimated catchment area population is useful in relating output to need. These indicators are recommended to be incorporated in district and hospital performance reviews and in annual reports.
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27
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Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Jessop CP, Savinov V. Bounds on the CP asymmetry in b --> sgamma decays. Phys Rev Lett 2001; 86:5661-5665. [PMID: 11415327 DOI: 10.1103/physrevlett.86.5661] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2000] [Indexed: 05/23/2023]
Abstract
We have measured the CP asymmetry A(CP) identical with[gamma(b-->sgamma)-gammab-->sgamma)]/[gamma(b-->sgamma)+gamma(b-->sgamma)] to be A(CP) = (-0.079+/-0.108+/-0.022) (1.0+/-0.030), implying that, at 90% confidence level, A(CP) lies between -0.27 and +0.10. These limits rule out some extreme non-standard-model predictions, but are consistent with most, as well as with the standard model.
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Affiliation(s)
- T E Coan
- Southern Methodist University, Dallas, Texas 75275, USA
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28
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Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Park W, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ. Bounds on the CP asymmetry in like-sign dileptons from B(0)B*(0) meson decays. Phys Rev Lett 2001; 86:5000-5003. [PMID: 11384405 DOI: 10.1103/physrevlett.86.5000] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2001] [Indexed: 05/23/2023]
Abstract
We have measured the charge asymmetry in like-sign dilepton yields from B(0)B*(0) meson decays using the CLEO detector at the Cornell Electron Storage Ring. We find a(0)(ll) identical with[N(l(+)l(+))-N(l(-)l(-))]/[N(l(+)l(+))+N(l(-)l(-))] = +0.013+/-0.050+/-0.005. We combine this result with a previous, independent measurement and obtain Re(epsilon(B))/(1+ the absolute value of epsilon(B)(2)) = +0.0035+/-0.0103+/-0.0015 (uncertainties are statistical and systematic, respectively) for the CP impurity parameter, epsilon(B).
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Affiliation(s)
- D E Jaffe
- University of California, San Diego, La Jolla, California 92093, USA
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Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Savinov V, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F. Study of tau decays to six pions and a neutrino. Phys Rev Lett 2001; 86:4467-4471. [PMID: 11384261 DOI: 10.1103/physrevlett.86.4467] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2000] [Indexed: 05/23/2023]
Abstract
The tau decays to six-pion final states have been studied with the CLEO detector at the Cornell Electron Storage Ring. The measured branching fractions are B(tau(-)-->2pi(-)pi(+)3pi(0)nu(tau)) = (2.2+/-0.3+/-0.4)x10(-4) and B(tau(-)-->3pi(-)2pi(+)pi(0)nu(tau)) = (1.7+/-0.2+/-0.2)x10(-4). A search for substructure in these decays shows that they are saturated by intermediate states with eta or omega mesons. We present the first observation of the decay tau(-)-->2pi(-)pi(+)omega(nu)tau and the branching fraction is measured to be (1.2+/-0.2+/-0.1)x10(-4). The measured branching fractions are in good agreement with the isospin expectations but somewhat below the conserved-vector-current predictions.
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Affiliation(s)
- A Anastassov
- Ohio State University, Columbus, Ohio 43210, USA
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Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Savinov V, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T. Observation of new states decaying into Lambda+(c)pi(-)pi(+). Phys Rev Lett 2001; 86:4479-4482. [PMID: 11384263 DOI: 10.1103/physrevlett.86.4479] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2000] [Indexed: 05/23/2023]
Abstract
Using 13.7 fb(-1) of data recorded by the CLEO detector at the Cornell Electron Storage Ring, we investigate the spectrum of charmed baryons which decay into Lambda+(c)pi(-)pi(+) and are more massive than the Lambda+(c)(2625) baryon. We find evidence for two new states: one is broad and has an invariant mass roughly 480 MeV above that of the Lambda+(c) baryon; the other is narrow with an invariant mass of 596+/-1+/-2 MeV above the Lambda+(c) mass.
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Affiliation(s)
- M Artuso
- Syracuse University, Syracuse, New York 13244, USA
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31
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Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Ferguson T, Vogel H, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH. Evidence of New States Decaying into Xi(*)(c)pi. Phys Rev Lett 2001; 86:4243-4246. [PMID: 11328145 DOI: 10.1103/physrevlett.86.4243] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2000] [Indexed: 05/23/2023]
Abstract
Using 13.7 fb(-1) of data recorded by the CLEO detector at Cornell Electron Storage Ring, we report evidence of two new charmed baryons: one decaying into Xi(0')(c)pi(+) with the subsequent decay Xi(0')(c)-->Xi(0)(c)gamma, and its isospin partner decaying into Xi(+')(c)pi(-) followed by Xi(+')(c)-->Xi(+)(c)gamma. We measure the following mass differences for the two states: M(Xi(0)(c)gammapi(+))-M(Xi(0)(c)) = 318.2+/-1.3+/-2.9 MeV and M(Xi(+)(c)gammapi(-))-M(Xi(+)(c)) = 324.0+/-1.3+/-3.0 MeV. We interpret these new states as the J(P) = 1 / 2(-) Xi(c1) particles, the charmed-strange analogs of the Lambda(+)(c1)(2593).
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Affiliation(s)
- S E Csorna
- Vanderbilt University, Nashville, Tennessee 37235
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Briere RA, Chen GP, Ferguson T, Vogel H, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Savinov V, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Boulahouache C, Bukin K, Dambasuren E, Majumder G, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Bornheim A, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Jaffe DE, Mahapatra R, Masek G, Paar HP, Asner DM, Eppich A, Hill TS, Morrison RJ. Observation of B --> phiK and B --> phiK*. Phys Rev Lett 2001; 86:3718-3721. [PMID: 11329307 DOI: 10.1103/physrevlett.86.3718] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2001] [Indexed: 05/23/2023]
Abstract
We have studied two-body charmless hadronic decays of B mesons into the final states straight phiK and phiK(*). Using 9.7 million B&Bmacr; pairs collected with the CLEO II detector, we observe the decays B- --> phiK- and B0--> phiK(*0) with the following branching fractions: B(B--->phiK-) = (5.5(+2.1)(-1.8)+/-0.6)x10(-6) and B(B0--> phiK(*0)) = (11.5(+4.5+1.8)(-3.7-1.7))x10(-6). We also see evidence for the decays B0-->phiK0 and B---> phiK(*-). However, since the statistical significance is not overwhelming for these modes, we determine upper limits of <12.3x10(-6) and <22.5x10(-6) ( 90% confidence level), respectively.
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Affiliation(s)
- R A Briere
- Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, USA
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Cronin-Hennessy D, Lyon AL, Thorndike EH, Savinov V, Coan TE, Fadeyev V, Gao YS, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Wang JC, Wolf A, Wu J, Kopp S, Kostin M, Mahmood AH, Csorna SE, Danko I, McLean KW, Xu Z, Godang R, Bonvicini G, Cinabro D, Dubrovin M, McGee S, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Gritsan A, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Drell PS, Duboscq JE, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Palmer M, Patterson JR, Peterson D, Riley D, Romano A, Thayer JG, Urner D, Valant-Spaight B, Viehhauser G, Warburton A, Avery P, Prescott C, Rubiera AI, Stoeck H, Yelton J, Brandenburg G, Ershov A, Kim DY, Wilson R, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V. Observation of the Omega(0)(c) Charmed Baryon at CLEO. Phys Rev Lett 2001; 86:3730-3734. [PMID: 11329310 DOI: 10.1103/physrevlett.86.3730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2000] [Indexed: 05/23/2023]
Abstract
The CLEO experiment at the CESR collider has used 13.7 fb(-1) of data to search for the production of the Omega(0)(c) (css ground state) in e(+)e(-) collisions at square root of (s) approximately 10.6 GeV. The modes used to study the Omega(0)(c) are Omega(-)pi(+), Omega(-)pi(+)pi(0), Xi-K-pi(+)pi(+), Xi0K-pi(+), and Omega(-)pi(+)pi(+)pi(-). We observe a signal of 40.4+/-9.0(stat) events at a mass of 2694.6+/-2.6(stat)+/-1.9(syst) MeV/c(2), for all modes combined.
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Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Ferguson T, Vogel H, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R. Search for B --> tau(nu) and B --> K(nu)nu. Phys Rev Lett 2001; 86:2950-2954. [PMID: 11290080 DOI: 10.1103/physrevlett.86.2950] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/26/2000] [Indexed: 05/23/2023]
Abstract
We report results of a search for B-->tau(nu) in a sample of 9.7 x 10(6) charged B meson decays. We exclusively reconstruct the companion B decay to suppress background. We set an upper limit on the branching fraction B(B-->tau(nu))<8.4 x 10(-4) at 90% confidence level. We also establish B(B+/--->K+/-nu(nu))<2.4 x 10(-4) at 90% confidence level.
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Affiliation(s)
- T E Browder
- University of Hawaii at Monoa, Honolulu 96822, USA
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Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Mahmood AH, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Menon N, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Kwon Y, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG. Measurement of the relative branching fraction of upsilon(4S) to charged and neutral B-meson pairs. Phys Rev Lett 2001; 86:2737-2741. [PMID: 11290027 DOI: 10.1103/physrevlett.86.2737] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2000] [Indexed: 05/23/2023]
Abstract
We analyze 9.7x10(6) B_B pairs recorded with the CLEO detector to determine the production ratio of charged to neutral B-meson pairs produced at the Upsilon(4S) resonance. We measure the rates for B0-->J/psiK((*)0) and B+-->J/psiK((*)+) decays and use the world-average B-meson lifetime ratio to extract the relative widths f(+-) / f(00) = gamma(Upsilon(4S)-->B+B-) / gamma(Upsilon(4S)-->B0 B-0)) = 1.04+/-0.07(stat)+/-0.04(syst). With the assumption that f(+-)+f(00) = 1, we obtain f(00) = 0.49+/-0.02(stat)+/-0.01(syst) and f(+-) = 0.51+/-0.02(stat)+/-0.01(syst). This production ratio and its uncertainty apply to all exclusive B-meson branching fractions measured at the Upsilon(4S) resonance.
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Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X. First observation of the decays B(0) --> D(*-)p_p pi+ and B(0) --> D(*-)p_n. Phys Rev Lett 2001; 86:2732-2736. [PMID: 11290026 DOI: 10.1103/physrevlett.86.2732] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2000] [Indexed: 05/23/2023]
Abstract
We report the first observation of exclusive decays of the type B-->D(*)N_NX, where N is a nucleon. Using a sample of 9.7x10(6)B_B pairs collected with the CLEO detector operating at the Cornell Electron Storage Ring, we measure the branching fractions B(B0-->D(*-)p_p pi(+)) = (6.5(+1.3)(-1.2)+/-1.0)x10(-4) and B(B0-->D(*-)p_n) = (14.5(+3.4)(-3.0)+/-2.7)x10(-4). Antineutrons are identified by their annihilation in the CsI electromagnetic calorimeter.
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Affiliation(s)
- S Anderson
- University of Minnesota, Minneapolis, MN 55455, USA
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Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Chen GP, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kandaswamy J, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S. Measurement of the lambda(+)(c) lifetime. Phys Rev Lett 2001; 86:2232-2236. [PMID: 11289897 DOI: 10.1103/physrevlett.86.2232] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2000] [Indexed: 05/23/2023]
Abstract
The Lambda+c lifetime is measured using 9.0 fb(-1) of e+e- annihilation data collected on or just below the Upsilon(4S) resonance with the CLEO II.V detector at CESR. Using an unbinned maximum likelihood fit, the Lambda+c lifetime is measured to be 179.6+/-6.9(stat)+/-4.4(syst) fs. The precision of this colliding beam measurement is comparable to other measurements, which are based on fixed-target experiments, with different systematic uncertainties.
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Affiliation(s)
- A H Mahmood
- University of Texas, Pan American, Edinburg 78539, USA
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Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Chen GP, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ. First observation of the sigma(*+)(c) baryon and a new measurement of the sigma(*+)(c) mass. Phys Rev Lett 2001; 86:1167-1170. [PMID: 11178035 DOI: 10.1103/physrevlett.86.1167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2000] [Indexed: 05/23/2023]
Abstract
Using data recorded with the CLEO II and CLEO II.V detector configurations at the Cornell Electron Storage Rings, we report the first observation and mass measurement of the Sigma(*+)(c) charmed baryon, and an updated measurement of the mass of the Sigma(+)(c) baryon. We find M(Sigma(*+)(c))-M(Lambda(+)(c)) = (231.0+/-1.1+/-2.0) MeV, and M(Sigma(+)(c))-M(Lambda(+)(c)) = (166.4+/-0.2+/-0.3) MeV, where the errors are statistical and systematic, respectively.
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Abstract
BACKGROUND Minor surgical operations are performed at almost all hospitals, health centres and dispensaries in Africa. A large proportion of the operations are urgent, prompted by injuries and acute infections. They are rarely recorded and reported systematically, and rates and patterns are poorly known. OBJECTIVE To describe of all minor surgery performed on a rural African population during one year. DESIGN Prospective recording and analysis of minor surgical procedures and of the patients undergoing the same procedures. SETTING Hospitals, health centres, dispensaries and mission clinics in Meru district, Kenya. RESULTS Out of 26,858 minor operations performed (2,066/100,000 people/year) 22,838 were done at the five hospitals in the district while 2,510 were done at 49 mission clinics (4.3/clinic/month), 764 at ten health centres (6.4/health centre/month) and 620 at 29 dispensaries (1.8/dispensary/month). The most common operations were episiotomy, tooth extraction, wound suture and incision and drainage of abscess. More minor surgery is done on women than on men, and the difference is related to obstetrical procedures. CONCLUSIONS Relatively few operations were performed at health centres, dispensaries and mission clinics. Possible explanations include perceived quality of care, staff motivation, poor service access outside office hours and service charges.
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Affiliation(s)
- E Nordberg
- African Medical and Research Foundation, P.O. Box 30125, Nairobi, Kenya
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40
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Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J. Study of B Decays to Charmonium States: B-->eta(c)K and B --> chi(c0)K. Phys Rev Lett 2001; 86:30-34. [PMID: 11136086 DOI: 10.1103/physrevlett.86.30] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2000] [Indexed: 05/23/2023]
Abstract
In a sample of 9.66x10(6)B&Bmacr; pairs collected with the CLEO detector we make the first observation of B decays to an eta(c) and a kaon. We measure branching fractions B(B+-->eta(c)K+) = (0.69(+0.26)(-0.21)+/-0.08+/-0.20)x10(-3) and B(B degrees -->eta(c)K degrees ) = (1.09(+0.55)(-0.42)+/-0.12+/-0.31)x10(-3), where the first error is statistical, the second is systematic, and the third is from the eta(c) branching fraction uncertainty. From these we extract the eta(c) decay constant in the factorization approximation, f(eta(c)) = 335+/-75 MeV. We also search for B decays to a chi(c0) and a kaon. No evidence for a signal is found and we set 90% C.L. upper limits: B(B+-->chi(c0)K+)<4.8x10(-4) and B(B degrees -->chi(c0)K degrees )<5.0x10(-4).
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Affiliation(s)
- KW Edwards
- Carleton University, Ottawa, Ontario, Canada K1S 5B6 and and the Institute of Particle Physics, Canada
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Nordberg E. Injuries as a public health problem in sub-Saharan Africa: epidemiology and prospects for control. East Afr Med J 2000; 77:S1-43. [PMID: 12862115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Injuries are common and on increase in most developing countries, including sub-Saharan Africa. A large proportion of the injuries are caused by road traffic accidents, falls, burns, assaults, bites, stings and other animal-related injuries, poisonings, drownings/near-drownings and suicide. Globally, injuries are responsible for about five per cent of the total mortality, and the overall global annual costs were estimated in the late 1980s at around 500 billion US dollars. The burden and pattern of injuries in Africa and other developing areas are poorly known and not well studied. The incidence is on the increase, partly due to rapid growth of motorised transport and to expansion of industrial production without adequate safety precautions. This is a review of data on various kinds of injuries in developing countries with a focus on sub-Saharan Africa. A computerised search of the relevant literature published between 1985 and 1998 was conducted and a manual search of journals publishing texts on health in low-income countries and in tropical environments was also done. A few studies on injury prevention policy and on research related to injury epidemiology and prevention have also been identified and included. It is concluded that in a relatively typical East African area with a total mortality rate of 1,300/100,000/year, injuries are likely to cause around 100 of these deaths. The corresponding total rate of significant injuries is estimated at 40,000/100,000/year with a breakdown as tabulated below. [table: see text] Although a few surveys and other investigations of injuries have been conducted over the years, injury epidemiology and control remain under-researched and relatively neglected subject areas. Much needs to be done. Collection and analysis of injury data need to be standardised, for example regarding age groups, gender disaggregation and severity. Injuries and accidents should be subdivided in at least road traffic injury, fall, burn, assault, poisoning, drowning, suicide, homicide and others, and details regarding time and place, victim and main cause should be noted. Morbidity survey field staff should be informed that injuries are part of the illness concept and that questions should be asked accordingly. Details regarding the circumstances surrounding different injuries must be known to those who develop preventive programmes. Injury is a public health problem affecting some people more than others. Our ordinary environment--the home, the work-site, the street or road--represents various kinds of risk, and some of these are difficult to eliminate. Not only do we have to accept much of our environment with its existing houses, equipment, vehicles, transport systems, energy supply, toxic substances etcetera, many also suffer from various inherited or acquired conditions that increase the risk. We therefore need to develop safer and more "forgiving" living environments where ordinary people can live and move around safely. Injury control activities may focus on different categories of injury. Road safety measures often include information and education campaigns, improved driver training, road design and maintenance, regular vehicle safety checks, separation of pedestrians from vehicle traffic, speed limits, safety belt, air-bag and helmet use, special training and control of public service vehicle drivers, bicycle lane separation, road lighting, reflectorised materials on clothing, review of the road traffic related legislation and law enforcement, and emergency medical services improvement. Domestic injuries can be prevented for example with window guards, child barriers at stairs, smoke detectors, clothes and furniture in less flammable materials, replacement of open stoves, stabilising of open lamps, fire-fighting equipment and practice, child-proof poison packaging and storage, safe disposal of toxic waste, home safety education of parents, and strict building code enforcement. Occupational injuries can largely be prevented if well adapted to the work environment. Research is required in several areas. An improved facility-based injury recording and reporting system needs to be developed and tested. There is need to combine data collection methods, such as interview surveys, hospital records, police records, focus group discussions and key informant interviews. The outcome of emergency medical care and of different forms of transport and referral needs to be determined. Different combinations of preventive interventions needs to be evaluated. This review is intended as guidance for those who need a broad overview of the subject of injury occurrence and prevention in Africa, for example in preparation for the development of injury control programmes or to help identify issues requiring further research in this field.
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Affiliation(s)
- E Nordberg
- African Medical and Research Foundation, P.O. Box 30125, Nairobi, Kenya
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42
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Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Stepaniak CJ, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Eckhart E, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi SJ, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Lyon AL, Thorndike EH, Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Mahmood AH, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Pappas SP, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Briere RA, Ferguson T, Vogel H, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Galik RS, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Urner D, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J. Measurements of the mass, total width, and two-photon partial width of the eta(c) meson. Phys Rev Lett 2000; 85:3095-3099. [PMID: 11019275 DOI: 10.1103/physrevlett.85.3095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2000] [Indexed: 05/23/2023]
Abstract
Using 13.4 fb(-1) of data collected with the CLEO detector at the Cornell Electron Storage Ring, we have observed 300 events for the two-photon production of ground-state pseudoscalar charmonium in the decay eta(c)-->K(0)(S)K-/+pi(+/-). We have measured the eta(c) mass to be [2980.4+/-2.3 (stat)+/-0.6 (syst)] MeV and its full width as [27.0+/-5.8 (stat)+/-1.4 (syst)] MeV. We have determined the two-photon partial width of the eta(c) meson to be [7.6+/-0.8 (stat)+/-0.4 (syst)+/-2.3 (br)] keV, with the last uncertainty associated with the decay branching fraction.
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Affiliation(s)
- G Brandenburg
- Harvard University, Cambridge, Massachusetts 02138, USA
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43
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Jessop CP, Marsiske H, Perl ML, Savinov V, Ugolini D, Zhou X, Coan TE, Fadeyev V, Maravin Y, Narsky I, Stroynowski R, Ye J, Wlodek T, Artuso M, Ayad R, Boulahouache C, Bukin K, Dambasuren E, Karamov S, Majumder G, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Wang JC, Wolf A, Wu J, Kopp S, Csorna SE, Danko I, McLean KW, Márka S, Xu Z, Godang R, Kinoshita K, Lai IC, Schrenk S, Bonvicini G, Cinabro D, McGee S, Perera LP, Zhou GJ, Lipeles E, Schmidtler M, Shapiro A, Sun WM, Weinstein AJ, Würthwein F, Jaffe DE, Masek G, Paar HP, Potter EM, Prell S, Sharma V, Asner DM, Eppich A, Hill TS, Morrison RJ, Nelson HN, Briere RA, Behrens BH, Ford WT, Gritsan A, Roy J, Smith JG, Alexander JP, Baker R, Bebek C, Berger BE, Berkelman K, Blanc F, Boisvert V, Cassel DG, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Foland AD, Gaidarev P, Gibbons L, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Jones CD, Kreinick DL, Lohner M, Magerkurth A, Meyer TO, Mistry NB, Nordberg E, Patterson JR, Peterson D, Riley D, Thayer JG, Thies PG, Valant-Spaight B, Warburton A, Avery P, Prescott C, Rubiera AI, Yelton J, Zheng J, Brandenburg G, Ershov A, Gao YS, Kim DY, Wilson R, Browder TE, Li Y, Rodriguez JL, Yamamoto H, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Janicek R, Patel PM, Sadoff AJ, Ammar R, Bean A, Besson D, Davis R, Kwak N, Zhao X, Anderson S, Frolov VV, Kubota Y, Lee SJ, Mahapatra R, O'Neill JJ, Poling R, Riehle T, Smith A, Urheim J, Ahmed S, Alam MS, Athar SB, Jian L, Ling L, Mahmood AH, Saleem M, Timm S, Wappler F, Anastassov A, Duboscq JE, Gan KK, Gwon C, Hart T, Honscheid K, Hufnagel D, Kagan H, Kass R, Pedlar TK, Schwarthoff H, Thayer JB, von Toerne E, Zoeller MM, Richichi J, Severini H, Skubic P, Undrus A, Chen S, Fast J, Hinson JW, Lee J, Menon N, Miller DH, Shibata EI, Shipsey IP, Pavlunin V, Cronin-Hennessy D, Kwon Y, Lyon AL, Thorndike EH. Study of charmless hadronic B meson decays to pseudoscalar-vector final states. Phys Rev Lett 2000; 85:2881-2885. [PMID: 11005959 DOI: 10.1103/physrevlett.85.2881] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2000] [Indexed: 05/23/2023]
Abstract
We report results of searches for charmless hadronic B meson decays to pseudoscalar( pi(+/-), K+/-, pi(0), or K(0)(S))-vector( rho, K(*), or omega) final states. By using 9.7x10(6) BB pairs collected with the CLEO detector, we report the first observation of B(-)--->pi(-)rho(0), B(0)-->pi(+/-)rho(-/+), and B(-)-->pi(-)omega, which are expected to be dominated by hadronic b-->u transitions. The measured branching fractions are (10.4(+3.3)(-3.4)+/-2.1)x10(-6), (27.6(+8.4)(-7.4)+/-4.2)x10(-6), and (11.3(+3.3)(-2.9)+/-1. 4)x10(-6), respectively. Branching fraction upper limits are set for all of the other decay modes investigated.
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Affiliation(s)
- C P Jessop
- Stanford Linear Accelerator Center, Stanford University, Stanford, California 94309, USA
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Abstract
OBJECTIVE To determine the pattern and burden of injuries, their causes and action taken in a rural and urban community in Kenya. DESIGN Household interview survey and focus group discussions. SETTING Four rural villages and five urban clusters in Kiambu District, Kenya. SUBJECTS A total of 1,980 members of 200 rural and 230 urban households. RESULTS The number of reported injuries was 495, corresponding to 300,000 injuries per 100,000 people per year. Most common were cut or piercing (38.4%), followed by fall (16.2%), burn or scald (14.3%), animal bite or kick (10.1%), hit by moving object (5.9%) and road traffic accident (3.6%). Poisoning, sub-mersion/drowning and explosion were uncommon, each below three per cent. Of all reported injuries, 149 (30.1%) sought care from traditional healers, 91 (18.4%) were subject to self-care, 76 (15.4%) obtained service from drug shops, 22 (4.4%) were brought to a health facility for attention and 17 (3.4%) took no action at all. Additional information was obtained through focus group discussions with students, teachers and members of women groups. These generated detailed information about cases of sexual assault within and outside households which had not been captured during the previous household interviews. CONCLUSION Injuries are very common but most of them are mild, prompting only home care or no action at all. Only one out of 25 injuries were brought to a health facility for attention. Some types of injury, such as domestic violence and sexual assault, are more likely to be captured through focus group discussions than during household interviews. A combination of methods is likely to best reflect the pattern of injury at community level.
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Affiliation(s)
- E Nordberg
- Karolinska Institutet, 17176 Stockholm, Sweden
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Wachira J, Nordberg E. Airborne surgical outreach services in eastern Africa. East Afr Med J 1998; 75:563-6. [PMID: 10065187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
Abstract
BACKGROUND African Medical and Research Foundation (AMREF) has for forty years offered airborne specialist surgeons or surgical teams to supplement the major surgery conducted by local hospital staff, particularly in Kenya and Tanzania. OBJECTIVE To quantify and qualitatively describe the contribution of airborne surgical outreach services in relation to the total surgical output of remote rural hospitals in Kenya and Tanzania. DATA SOURCES Surgical theatre registration books of one government and two church/mission owned hospitals in Kenya and Tanzania from 1994 to 1995; and service records kept by the surgeons during outreach trips in the same period. RESULTS AMREF contributed 15.1% of all major operations, and operations performed by AMREF were relatively complex. The average number of AMREF's major operations performed per visit was 17 and per visit day 4.3. Numerous minor operations and examinations, ward rounds and an average of 10 patient consultations per day were done during the visits. CONCLUSIONS Total population-based operation rates, and rates by sex and age, are useful indicators for monitoring and comparison. Every hospital should report, annually, major operations performed by type and by age and sex of patients, with special mention of operations and consultations performed by visiting teams, if any. Each hospital should also state the estimated population of its current catchment area.
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Affiliation(s)
- J Wachira
- African Medical and Research Foundation, Nairobi, Kenya
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Abstract
Existing health information systems in developing countries are managed and used mainly by biomedically trained personnel and by general healthcare administrators. They focus on epidemiology, service utilization and finance; they generate little of the socio-cultural data needed for developing and adjusting health services and disease control programmes to local health-related perceptions, values and resources. This paper reviews some of the published literature on socio-cultural factors related to health and summarizes the findings of a health household interview study in rural Kenya. It concludes that local views on specific disease categories and their causes are crucial for the planning of local disease control and that health information systems need to be expanded to incorporate such data. It discusses methods of generating community-based socio-cultural health information likely to be useful, particularly at district level. Options include observation, household interviews, focus group discussions and key informant interviews. Four improvements are suggested: (1) health information systems should be reoriented to focus less on individual patients and clients and more on population-based information including socio-cultural data; (2) post-basic health manpower training is needed in applied health-related social sciences; (3) staff positions for social scientists at central, provincial and district levels of the health sector; and (4) expansion of research on national and local socio-cultural issues of relevance to health and care-seeking behaviour.
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Affiliation(s)
- D Nyamwaya
- African Medical and Research Foundation (AMREF), Nairobi, Kenya
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Engedal K, Nordberg E, Moksnes KM, Henriksen HK, Bergem AL. [Geriatric psychiatry--a specialty gaining recognition]. Tidsskr Nor Laegeforen 1997; 117:3681-3. [PMID: 9417665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Services for elderly, mentally ill people have developed in response to changing needs in society. In 1990 most of the 650 beds allocated to elderly patients in psychiatric hospitals were occupied by long-term care patients. Outpatient programmes hardly existed. In 1995 about 400 beds were allocated to geriatric psychiatry. They were served by 40 physicians and 20 psychologists. Out-patients' clinics were established. Most of the in-patients were short-term admissions. Nowadays, departments of geriatric psychiatry define themselves as diagnostic and short-term units. About a third of the in-patients suffer from dementia, a third from depression, and a third from various other psychiatric disorders. The authors recommend that a special unit for geriatric psychiatry should be established in every county in Norway. Funds should be allocated for professorships at all universities.
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Affiliation(s)
- K Engedal
- Psykogeriatrisk seksjon, Ullevål sykehus, Oslo
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48
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Nordberg E. Health and the elderly in developing countries with special reference to sub-Saharan Africa. East Afr Med J 1997; 74:629-33. [PMID: 9529743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The numbers of elderly people in sub-Saharan Africa are growing rapidly with increasing life expectancy while at the same time the proportions of children in the populations are declining. The number of people 80 years and above increased tenfold in large parts of Africa since the 1950's, and the number of widows is growing fast. All this has several implications, including erosion of the social support by extended families and a dramatic change in the disease pattern. There will be increasing rates of cancer, liver cirrhosis, kidney failure, eye disease, osteoarthrosis, diabetes, mental illness and chronic degenerative illnesses such as cardiovascular disease. Multiple illness and permanent disability will become more common. African health care systems are ill-prepared for this transition, and social security for the elderly need to be improved in the coming years. Local and regional research into morbidity and well-being is important for policy formulation. The situation of different categories of chronically sick needs to be investigated. Improved health in childhood and middle age will probably be followed by improved health in old age, and this may offset the burden on the health care system of the growing number of elderly.
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Affiliation(s)
- E Nordberg
- African Medical and Research Foundation, Nairobi, Kenya
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Coan TE, Fadeyev V, Korolkov I, Maravin Y, Narsky I, Shelkov V, Staeck J, Stroynowski R, Volobouev I, Ye J, Artuso M, Efimov A, Frasconi F, Gao M, Goldberg M, He D, Kopp S, Moneti GC, Mountain R, Schuh S, Skwarnicki T, Stone S, Viehhauser G, Xing X, Bartelt J, Csorna SE, Jain V, Marka S, Freyberger A, Godang R, Kinoshita K, Lai IC, Pomianowski P, Schrenk S, Bonvicini G, Cinabro D, Greene R, Perera LP, Zhou GJ, Barish B, Chadha M, Chan S, Eigen G, Miller JS, O’Grady C, Schmidtler M, Urheim J, Weinstein AJ, Würthwein F, Asner DM, Bliss DW, Brower WS, Masek G, Paar HP, Sharma V, Gronberg J, Hill TS, Kutschke R, Lange DJ, Menary S, Morrison RJ, Nelson HN, Nelson TK, Qiao C, Richman JD, Roberts D, Ryd A, Witherell MS, Balest R, Behrens BH, Cho K, Ford WT, Park H, Rankin P, Roy J, Smith JG, Alexander JP, Bebek C, Berger BE, Berkelman K, Bloom K, Cassel DG, Cho HA, Coffman DM, Crowcroft DS, Dickson M, Drell PS, Ecklund KM, Ehrlich R, Elia R, Foland AD, Gaidarev P, Galik RS, Gittelman B, Gray SW, Hartill DL, Heltsley BK, Hopman PI, Kandaswamy J, Katayama N, Kim PC, Kreinick DL, Lee T, Liu Y, Ludwig GS, Masui J, Mevissen J, Mistry NB, Ng CR, Nordberg E, Ogg M, Patterson JR, Peterson D, Riley D, Soffer A, Ward C, Athanas M, Avery P, Jones CD, Lohner M, Prescott C, Yelton J, Zheng J, Brandenburg G, Briere RA, Gao YS, Kim DYJ, Wilson R, Yamamoto H, Browder TE, Li F, Li Y, Rodriguez JL, Bergfeld T, Eisenstein BI, Ernst J, Gladding GE, Gollin GD, Hans RM, Johnson E, Karliner I, Marsh MA, Palmer M, Selen M, Thaler JJ, Edwards KW, Bellerive A, Janicek R, MacFarlane DB, McLean KW, Patel PM, Sadoff AJ, Ammar R, Baringer P, Bean A, Besson D, Coppage D, Darling C, Davis R, Hancock N, Kotov S, Kravchenko I, Kwak N, Anderson S, Kubota Y, Lattery M, Lee SJ, O’Neill JJ, Patton S, Poling R, Riehle T, Savinov V, Smith A, Alam MS, Athar SB, Ling Z, Mahmood AH, Severini H, Timm S, Wappler F, Anastassov A, Blinov S, Duboscq JE, Fisher KD, Fujino D, Fulton R, Gan KK, Hart T, Honscheid K, Kagan H, Kass R, Lee J, Spencer MB, Sung M, Undrus A, Wanke R, Wolf A, Zoeller MM, Nemati B, Richichi SJ, Ross WR, Skubic P, Wood M, Bishai M, Fast J, Gerndt E, Hinson JW, Menon N, Miller DH, Shibata EI, Shipsey IPJ, Yurko M, Gibbons L, Johnson SD, Kwon Y, Roberts S, Thorndike EH, Jessop CP, Lingel K, Marsiske H, Perl ML, Schaffner SF, Ugolini D, Wang R, Zhou X. ντhelicity fromh±energy correlations. Int J Clin Exp Med 1997. [DOI: 10.1103/physrevd.55.7291] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Abstract
North-South health development cooperation often includes research financed largely by external donors. The cooperation varies between projects and programmes with regard to subject area, mix of disciplines involved, research methods, training components and project management arrangements. A variety of problems is encountered, but they are rarely described and discussed in published project reports. We authors conducted a study of a small number of European health researchers collaborating with researchers from the Third World. We focused upon projects involving both biomedical and social science researchers, and apart from a literature review three methods were applied: self-administered questionnaires to European researchers, semistructured interviews with five IHCAR researchers, and written summaries by the three authors, each on one recent or ongoing collaborative project of their choice. Most collaborative projects were initiated from the North and are monodisciplinary or partly interdisciplinary in the sense that researchers did independent data collection preceded by joint planning and followed by joint analysis and write-up. There may be disagreements concerning remuneration such as allowances in relation to fieldwork and training. Socio-cultural misunderstanding and conflict was reportedly rare, and no serious problems were reported regarding authorship and publishing. It is concluded that collaborative research is a complex and poorly understood process with considerable potential and worth pursuing despite the problems. Difficulties related to logistics and finance are easily and freely discussed, while there is little evidence that transdisciplinary research is conducted or even discussed. We recommend that published and unpublished reports on collaborative research projects include more detailed accounts of the North-South collaborative arrangements and their management, ethical and financial aspects.
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Affiliation(s)
- B Maina-Ahlberg
- Department of International Health and Social Medicine, Karolinska Institutet, Stockholm, Sweden
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