101
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Huang GS, Miller DH, Pavlunin V, Sanghi B, Shipsey IPJ, Adams GS, Chasse M, Cravey M, Cummings JP, Danko I, Napolitano J, He Q, Muramatsu H, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Li J, Menaa N, Mountain R, Nandakumar R, Randrianarivony K, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Briere RA, Chen GP, Chen J, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Rosner JL, Adam NE, Alexander JP, Berkelman K, Cassel DG, Crede V, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Phillips EA, Pivarski J, Riley D, Ryd A, Sadoff AJ, Schwarthoff H, Shi X, Shepherd MR, Stroiney S, Sun WM, Urner D, Weaver KM, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Williams J, Wiss J, Edwards KW, Besson D, Pedlar TK, Cronin-Hennessy D, Gao KY, Gong DT, Hietala J, Kubota Y, Klein T, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Dobbs S, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Severini H, Asner DM, Dytman SA, Love W, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J. Absolute branching fraction measurements of exclusive D+ semileptonic decays. PHYSICAL REVIEW LETTERS 2005; 95:181801. [PMID: 16383892 DOI: 10.1103/physrevlett.95.181801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2005] [Indexed: 05/05/2023]
Abstract
Using data collected at the psi(3770) resonance with the CLEO-c detector at the Cornell e+e- storage ring, we present improved measurements of the absolute branching fractions of D+decays to K0e+ve, pi0e+ve, K*0e+ve, and p0e+ve, and the first observation and absolute branching fraction measurement of D+ --> omega e+ve. We also report the most precise tests to date of isospin invariance in semileptonic D0 and D+ decays.
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Coan TE, Gao YS, Liu F, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Li J, Menaa N, Mountain R, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Briere RA, Chen GP, Chen J, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Rosner JL, Adam NE, Alexander JP, Berkelman K, Cassel DG, Crede V, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Pivarski J, Phillips EA, Riley D, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Stroiney S, Sun WM, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Williams J, Wiss J, Edwards KW, Besson D, Pedlar TK, Cronin-Hennessy D, Gao KY, Gong DT, Kubota Y, Klein T, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Dobbs S, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Severini H, Asner DM, Dytman SA, Love W, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cravey M, Cummings JP, Danko I, Napolitano J, He Q, Muramatsu H, Park CS, Park W, Thorndike EH. Absolute branching fraction measurements of exclusive D0 semileptonic decays. PHYSICAL REVIEW LETTERS 2005; 95:181802. [PMID: 16383893 DOI: 10.1103/physrevlett.95.181802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2005] [Indexed: 05/05/2023]
Abstract
With the first data sample collected by the CLEO-c detector at the psi(3770) resonance we have studied four exclusive semileptonic decays of the D0 meson. Our results include the first observation and absolute branching fraction measurement for D0 --> p-e+ve and improved measurements of the absolute branching fractions for D0 decays to K-e+ve, pi-e+ve, and K*-e+ve.
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103
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He Q, Muramatsu H, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Li J, Menaa N, Mountain R, Nandakumar R, Randrianarivony K, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Briere RA, Chen GP, Chen J, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Rosner JL, Adam NE, Alexander JP, Berkelman K, Cassel DG, Crede V, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Phillips EA, Pivarski J, Riley D, Ryd A, Sadoff AJ, Schwarthoff H, Shi X, Shepherd MR, Stroiney S, Sun WM, Urner D, Weaver KM, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Williams J, Wiss J, Edwards KW, Besson D, Pedlar TK, Cronin-Hennessy D, Gao KY, Gong DT, Hietala J, Kubota Y, Klein T, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Dobbs S, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Severini H, Asner DM, Dytman SA, Love W, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shipsey IPJ, Adams GS, Chasse M, Cravey M, Cummings JP, Danko I, Napolitano J. Measurement of absolute hadronic branching fractions of D mesons and e+e- -->DD cross sections at Ec.m.=3773 MeV. PHYSICAL REVIEW LETTERS 2005; 95:121801. [PMID: 16197064 DOI: 10.1103/physrevlett.95.121801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2005] [Indexed: 05/04/2023]
Abstract
Using 55.8 pb(-1) of e+e- collisions recorded at the psi(3770) resonance with the CLEO-c detector at CESR, we determine absolute hadronic branching fractions of charged and neutral D mesons using a double tag technique. Among measurements for three D0 and six D+ modes, we obtain reference branching fractions B(D0-->K-pi+)=(3.91+/-0.08+/-0.09)% and B(D+-->K-pi+pi+)=(9.5+/-0.2+/-0.3)%, where the uncertainties are statistical and systematic, respectively. Final state radiation is included in these branching fractions by allowing for additional, unobserved, photons in the final state. Using a determination of the integrated luminosity, we also extract the cross sections sigma(e+e- -->D0D0)=(3.60+/-0.07(+0.07)(-0.05)) nb and sigma(e+e- -->D+D-)=(2.79+/-0.07(+0.10)(-0.04)) nb.
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104
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Rosner JL, Adam NE, Alexander JP, Berkelman K, Cassel DG, Crede V, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Phillips EA, Pivarski J, Riley D, Ryd A, Sadoff AJ, Schwarthoff H, Shi X, Shepherd MR, Stroiney S, Sun WM, Urner D, Wilksen T, Weaver KM, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, White EJ, Williams J, Wiss J, Edwards KW, Besson D, Pedlar TK, Cronin-Hennessy D, Gao KY, Gong DT, Hietala J, Kubota Y, Klein T, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Dobbs S, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Severini H, Asner DM, Dytman SA, Love W, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shipsey IPJ, Adams GS, Cravey M, Cummings JP, Danko I, Napolitano J, He Q, Muramatsu H, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Artuso M, Boulahouache C, Blusk S, Butt J, Dorjkhaidav O, Li J, Menaa N, Mountain R, Nandakumar R, Randrianarivony K, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Briere RA, Chen GP, Chen J, Ferguson T, Tatishvili G, Vogel H, Watkins ME. Observation of the hc(1P1) state of charmonium. PHYSICAL REVIEW LETTERS 2005; 95:102003. [PMID: 16196921 DOI: 10.1103/physrevlett.95.102003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2005] [Indexed: 05/04/2023]
Abstract
The h(c)((1)P(1)) state of charmonium has been observed in the reaction psi(2S) --> pi(0)h(c) --> (gammagamma)(gammaeta(c)) using 3.08 x10(6) psi(2S) decays recorded in the CLEO detector. Data have been analyzed both for the inclusive reaction, where the decay products of the eta(c) are not identified, and for exclusive reactions, in which eta(c) decays are reconstructed in seven hadronic decay channels. We find M(h(c)) = 3524.4 +/- 0.6 +/- 0.4 MeV which corresponds to a hyperfine splitting DeltaM(hf)(1P) triple-bond <M((3)P(J)) - M((1)P(1)) = +1.0 +/- 0.6 +/- 0.4 MeV, and B(psi(2S) --> pi(0)h(c)) x B(h(c) --> gammaeta(c)) = (4.0 +/- 0.8 +/- 0.7) x 10(-4).
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105
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Briere RA, Chen GP, Chen J, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Rosner JL, Adam NE, Alexander JP, Berkelman K, Cassel DG, Crede V, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Phillips EA, Pivarski J, Riley D, Ryd A, Sadoff AJ, Schwarthoff H, Shi X, Shepherd MR, Stroiney S, Sun WM, Urner D, Wilksen T, Weaver KM, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, White EJ, Williams J, Wiss J, Edwards KW, Besson D, Pedlar TK, Cronin-Hennessy D, Gao KY, Gong DT, Hietala J, Kubota Y, Klein T, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Dobbs S, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Severini H, Asner DM, Dytman SA, Love W, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shipsey IPJ, Adams GS, Cravey M, Cummings JP, Danko I, Napolitano J, He Q, Muramatsu H, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Artuso M, Boulahouache C, Blusk S, Butt J, Dorjkhaidav O, Li J, Menaa N, Mountain R, Nandakumar R, Randrianarivony K, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M. Observation of thirteen new exclusive multibody hadronic decays of the psi(2S). PHYSICAL REVIEW LETTERS 2005; 95:062001. [PMID: 16090940 DOI: 10.1103/physrevlett.95.062001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2005] [Indexed: 05/03/2023]
Abstract
Using data accumulated with the CLEO detector corresponding to an integrated luminosity of [symbol: see text] = 5.63 pb(-1) on the peak of the psi(2S) [3.08 x 10(6) psi(2S) decays] and 20.70 pb(-1) at square root of[s] = 3.67 GeV, we report first measurements of the branching fractions for the following 13 decay modes of the psi(2S): eta3pi, &eta'3pi, rhoK+K-, K+K-pi+pi-pi0, 2(K+K-), 2(K+K-)pi0, rhopp, pppi+pi-pi0, etapp, ppK+K-, lambdalambdapi+pi-, lambdapK+, and lambdapK+pi+pi-, and more precise measurements of 8 previously measured modes: 2(pi+pi-), rhopi+pi-, 2(pi+pi-)pi0, omegapi+pi-, K+K-pi+pi-, omegaK+K-, phiK+K-, and pppi+pi-. We also report new branching fraction measurements of phipi+pi- and omegapp and upper limits for etapi+pi-, etaK+K-, and phivpp. Results are compared, where possible, with the corresponding J/psi branching ratios to provide new tests of the 12% rule.
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106
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Robinson AP, Woods PJ, Seweryniak D, Davids CN, Carpenter MP, Hecht AA, Peterson D, Sinha S, Walters WB, Zhu S. Ground state proton radioactivity from 121Pr: when was this exotic nuclear decay mode first discovered? PHYSICAL REVIEW LETTERS 2005; 95:032502. [PMID: 16090737 DOI: 10.1103/physrevlett.95.032502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2005] [Indexed: 05/03/2023]
Abstract
Ground-state proton radioactivity has been identified from 121Pr. A transition with a proton energy of E(p)=882(10) keV [Q(p)=900(10) keV] and half-life t(1/2)=10(+6)(-3) ms has been observed and is assigned to the decay of a highly prolate deformed 3/2(+) or 3/2(-) Nilsson state. The present result is found to be incompatible with a previously reported observation of ground-state proton radioactivity from 121Pr, which would have represented the discovery of this phenomenon.
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107
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Adam NE, Alexander JP, Berkelman K, Cassel DG, Crede V, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Phillips EA, Pivarski J, Riley D, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Stroiney S, Sun WM, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Williams J, Wiss J, Edwards KW, Besson D, Pedlar TK, Cronin-Hennessy D, Gao KY, Gong DT, Kubota Y, Klein T, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Dobbs S, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Severini H, Asner DM, Dytman SA, Love W, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cravey M, Cummings JP, Danko I, Napolitano J, He Q, Muramatsu H, Park CS, Park W, Thorndike EH, Coan TE, Gao YS, Liu F, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Li J, Menaa N, Mountain R, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Briere RA, Chen GP, Chen J, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Rosner JL. Branching fractions for psi(2S)-to-J/psi transitions. PHYSICAL REVIEW LETTERS 2005; 94:232002. [PMID: 16090461 DOI: 10.1103/physrevlett.94.232002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2005] [Indexed: 05/03/2023]
Abstract
We describe new measurements of the inclusive and exclusive branching fractions for psi(2S) transitions to J/psi using e(+)e(-) collision data collected with the CLEO detector operating at CESR. All branching fractions and ratios of branching fractions reported here represent either the most precise measurements to date or the first direct measurements. Indirectly and in combination with other CLEO measurements, we determine B(chi(cJ) --> gamma(J/psi)) and B[psi(2S) --> light hadrons].
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108
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Hinson JW, Huang GS, Lee J, Miller DH, Pavlunin V, Rangarajan R, Sanghi B, Shibata EI, Shipsey IPJ, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Dambasuren E, Dorjkhaidav O, Mountain R, Muramatsu H, Nandakumar R, Skwarnicki T, Stone S, Wang JC, 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, Watkins ME, Adam NE, Alexander JP, Berkelman K, Boisvert V, Cassel DG, 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, 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, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Lowrey N, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Besson D, 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, Honscheid K, Kagan H, Kass R, Pedlar TK, von Toerne E, Severini H, Skubic P, Dytman SA, Mueller JA, Nam S, Savinov V. Improved measurement of the form factors in the decay lambda+c-->lambda + nue. PHYSICAL REVIEW LETTERS 2005; 94:191801. [PMID: 16090160 DOI: 10.1103/physrevlett.94.191801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2004] [Indexed: 05/03/2023]
Abstract
Using the CLEO detector at the Cornell Electron Storage Ring, we have studied the distribution of kinematic variables in the decay lambda(+)(c)lambda--> e(+)nu(e). By performing a four-dimensional maximum likelihood fit, we determine the form factor ratio, R= f(2)/f(1) = -0.31 +/- 0.05(stat) +/- 0.04(syst), the pole mass, M(pole) = [2.21 +/- 0.08(stat) +/- 0.14(syst)] GeV/c(2), and the decay asymmetry parameter of the lambda(+)(c), alpha (lambda(c)) = -0.86 +/-0.03(stat) +/- 0.02(syst), for q(2) = 0.67 (GeV/c(2))(2). We compare the angular distributions of the lambda(+)(c) and lambda(-)(c) and find no evidence for CP violation: A(lambda(c)) = (alpha(lambda(c)) + alpha (lambda(c)))/(alpha(lambda(c))-alpha(lambda(c))) = 0.00 +/- 0.03(stat) +/- 0.01(syst) +/- 0.02, where the third error is from the uncertainty in the world average of the CP-violating parameter, A(lambda), for ppi(-).
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Jonkmans G, Andrews HR, Clifford ETH, Frketich G, Ing H, Koslowsky VT, Noulty RA, Miller RC, Zhou Y, Mortimer A, Peterson D, Wilkinson R. A Canadian high-energy neutron spectrometry system for measurements in space. ACTA ASTRONAUTICA 2005; 56:975-979. [PMID: 15835056 DOI: 10.1016/j.actaastro.2005.01.025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Bubble Technology Industries Inc. (BTI), with the support of the Canadian Space Agency, has finished the construction of the Canadian High-Energy Neutron Spectrometry System (CHENSS). This spectrometer is intended to measure the high energy neutron spectrum (approximately 1-100 MeV) encountered in spacecraft in low earth orbit. CHENSS is designed to fly aboard a US space shuttle and its scientific results should facilitate the prediction of neutron dose to astronauts in space from readings of different types of radiation dosimeters that are being used in various missions.
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Arndt PA, Garratty G, Daniels G, Green CA, Wilkes AM, Hunt P, Do J, Glenn S, Peterson D. Late onset neonatal anaemia due to maternal anti-Ge: possible association with destruction of eythroid progenitors. Transfus Med 2005; 15:125-32. [PMID: 15859979 DOI: 10.1111/j.0958-7578.2005.00562.x] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
There have been no reports of severe haemolytic disease of the newborn (HDN) due to Gerbich (Ge) antibodies. Two babies with HDN due to anti-Ge3, both born to the same mother, are described. The anti-Ge appeared in the first pregnancy and was not detectable in the first trimester, the babies' reticulocyte and bilirubin values were not greatly elevated (similar to HDN due to Kell antibodies), and the anaemia in both cases was either not apparent or not severe until 2 to 4 weeks after birth. Ge antigens are found on glycophorins (GPs) C and D; GPC, like Kell, has been shown to be expressed early on erythroid progenitor cells. The maternal anti-Ge3 was shown to promote phagocytosis of Ge+ early erythroid progenitors by monocytes (similar to what has been reported with anti-K and K+ progenitor cells). Thus, anti-Ge3 may cause immune destruction of erythroid progenitors and possibly suppression of erythropoiesis (which would explain the reticulocyte and bilirubin values seen in both cases). Anti-Ge3 appears to be capable of causing severe HDN. We suggest that babies born to mothers with anti-Ge should have their haemoglobin concentrations monitored for signs of anaemia for several weeks after birth. Functional assays may prove useful.
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Lori F, Pollard RB, Whitman L, Bakare N, Blick G, Shalit P, Foli A, Peterson D, Tennenberg A, Schrader S, Rashbaum B, Farthing C, Herman D, Norris D, Greiger P, Frank I, Groff A, Lova L, Asmuth D, Lisziewicz J. Lowering the dose of hydroxyurea minimizes toxicity and maximizes anti-HIV potency. AIDS Res Hum Retroviruses 2005; 21:263-72. [PMID: 15943568 DOI: 10.1089/aid.2005.21.263] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The goal of this study was to optimize the hydroxyurea dosage in HIV-infected patients, and to minimize the toxicity and maximize the antiviral efficacy of the hydroxyurea-didanosine combination. In a randomized, open-label study (RIGHT 702, a multicenter trial performed in private and institutional practices), three daily doses (600 microg, 800-900 microg, and 1200 microg) of hydroxyurea were administered in combination with didanosine and stavudine to 115 chronically HIV-infected patients, one-third antiretroviral drug naive, with viremia between 5000 and 200,000 copies/ml regardless of CD4+ cell count. The primary efficacy end point was the proportion of patients with plasma HIV-1 RNA levels below 400 copies/ml after 24 weeks of therapy. In the RIGHT 702 intent-to-treat population the lowest (600 mg) dose of hydroxyurea was better tolerated, associated with fewer adverse events, and more potent by all efficacy parameters, including the primary end point (76 versus 60% patients with viremia<400 copies/ml at week 24 for the 600-mg and 800- to 900-mg dose groups, respectively; p=0.027), the mean area under the curve (60.3 versus 65.8; p=0.016), and the mean log10 decrease (-1.95 versus -0.77; p=0.001). Patients receiving 600 mg of hydroxyurea daily also had the highest CD4+ cell count, CD4+/CD8+ cell ratio, and lowest CD8+ cell count and percentage (p=0.035). The RIGHT 702 trial provides an explanation for the increased toxicity and decreased efficacy of hydroxyurea when it was used at high dosage (1200 mg daily). At the optimal dosage of 600 mg daily, hydroxyurea, in combination with didanosine, deserves reevaluation for the long-term management of HIV/AIDS worldwide, because of its excellent resistance profile, durability, and affordability.
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Wuosmaa AH, Rehm KE, Greene JP, Henderson DJ, Janssens RVF, Jiang CL, Jisonna L, Moore EF, Pardo RC, Paul M, Peterson D, Pieper SC, Savard G, Schiffer JP, Segel RE, Sinha S, Tang X, Wiringa RB. Neutron spectroscopic factors in 9Li from 2H(8Li,p)9Li. PHYSICAL REVIEW LETTERS 2005; 94:082502. [PMID: 15783884 DOI: 10.1103/physrevlett.94.082502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2004] [Indexed: 05/24/2023]
Abstract
We have studied the 2H(8Li,p)9Li reaction to obtain information on the spins, parities, and single-neutron spectroscopic factors for states in 9Li, using a radioactive 8Li beam. The deduced properties of the lowest three states are compared to the predictions of a number of calculations for the structure of 9Li. The results of ab initio quantum Monte Carlo calculations are in good agreement with the observed properties.
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Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Li J, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Bornheim A, Pappas SP, Weinstein AJ, Rosner JL, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Cassel DG, Crede V, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Pivarski J, Riley D, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Stroiney S, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Wiss J, Edwards KW, Besson D, Pedlar TK, Cronin-Hennessy D, Gao KY, Gong DT, Kubota Y, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Dobbs S, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Arms K, Gan KK, Severini H, Asner DM, Dytman SA, Love W, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cravey M, Cummings JP, Danko I, Napolitano J, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R. Photon transitions in Upsilon(2S) and Upsilon(3S) decays. PHYSICAL REVIEW LETTERS 2005; 94:032001. [PMID: 15698251 DOI: 10.1103/physrevlett.94.032001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2004] [Indexed: 05/24/2023]
Abstract
We have studied the inclusive photon spectra in Upsilon(2S) and Upsilon(3S) decays using a large statistics data sample obtained with the CLEO III detector. We present the most precise measurements of electric dipole (E1) photon transition rates and photon energies for Upsilon(2S) --> gammachi(bJ)(1P) and Upsilon(3S) --> gammachi(bJ)(2P) (J = 0, 1, 2). We measure the rate for a rare E1 transition Upsilon(3S) --> gammachi(b0)(1P) for the first time. We also set upper limits on the rates for the hindered magnetic dipole (M1) transitions to the eta(b)(1S) and eta(b)(2S) states.
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Dobbs S, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Severini H, Asner DM, Dytman SA, Love W, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cravey M, Cummings JP, Danko I, Napolitano J, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Bornheim A, Pappas SP, Weinstein AJ, Rosner JL, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Cassel DG, Crede V, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Pivarski J, Riley D, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Stroiney S, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Wiss J, Edwards KW, Besson D, Pedlar TK, Gao KY, Gong DT, Kubota Y, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ. Search for X(3872) in gammagamma fusion and radiative production at CLEO. PHYSICAL REVIEW LETTERS 2005; 94:032004. [PMID: 15698254 DOI: 10.1103/physrevlett.94.032004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2004] [Indexed: 05/24/2023]
Abstract
We report on a search for the recently reported X(3872) state using 15.1 fb(-1) of e(+)e(-) data taken in the sqrt[s] = 9.46-11.30 GeV region. Separate searches for the production of the X(3872) in untagged gammagamma fusion and e(+)e(-) annihilation following initial state radiation are made by taking advantage of the unique angular correlation between the leptons from the decay J/psi --> l(+)l(-) in X(3872) decay to pi(+)pi(-)J/psi. No signals are observed in either case, and 90% confidence upper limits are established as (2J+1)Gamma(gammagamma)(X(3872))B(X --> pi(+)pi(-)J/psi) < 12.9 eV and Gamma(ee)(X(3872))B(X- -> pi(+)pi(-)J/psi) < 8.3 eV.
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115
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Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cummings JP, Danko I, Napolitano J, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Mahmood AH, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Bornheim A, Lipeles E, Pappas SP, Weinstein AJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Cassel DG, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Pedlar TK, Peterson D, Pivarski J, Riley D, Rosner JL, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Wiss J, Edwards KW, Besson D, Gao KY, Gong DT, Kubota Y, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Arms K, Gan KK, Severini H, Skubic P, Asner DM, Dytman SA, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J. Study of the semileptonic charm decays D(0)-->pi(-)l(+)nu and D(0)-->K(-)l(+)nu. PHYSICAL REVIEW LETTERS 2005; 94:011802. [PMID: 15698066 DOI: 10.1103/physrevlett.94.011802] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2004] [Indexed: 05/24/2023]
Abstract
We investigate the decays D(0)-->pi(-)l(+)nu and D(0)-->K(-)l(+)nu, where l is e or mu, using approximately 7 fb(-1) of data collected with the CLEO III detector. We find R(0) identical with B(D(0)-->pi(-)e(+)nu)/B(D(0)-->K(-)e(+)nu)=0.082+/-0.006+/-0.005. Fits to the kinematic distributions of the data provide parameters describing the form factor of each mode. Combining the form factor results and R(0) gives |f(pi)(+)(0)|(2)|V(cd)|(2)/|f(K)(+)(0)|(2)|V(cs)|(2)=0.038(+0.006+0.005)(-0.007-0.003).
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Adams GS, Chasse M, Cravey M, Cummings JP, Danko I, Napolitano J, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Bornheim A, Pappas SP, Weinstein AJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Cassel DG, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Pivarski J, Riley D, Rosner JL, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Wiss J, Edwards KW, Besson D, Gao KY, Gong DT, Kubota Y, Lang BW, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Arms K, Gan KK, Asner DM, Dytman SA, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ. Measurement of the muonic branching fractions of the narrow upsilon resonances. PHYSICAL REVIEW LETTERS 2005; 94:012001. [PMID: 15698068 DOI: 10.1103/physrevlett.94.012001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/03/2004] [Indexed: 05/24/2023]
Abstract
The decay branching fractions of the three narrow Upsilon resonances to mu(+)mu(-) have been measured by analyzing about 4.3 fb(-1) e(+)e(-) data collected with the CLEO III detector. The branching fraction B(Upsilon(1S)-->mu(+)mu(-))=(2.49+/-0.02+/-0.07)% is consistent with the current world average, but B(Upsilon(2S)-->mu(+)mu(-))=(2.03+/-0.03+/-0.08)% and B(Upsilon(3S)-->mu(+)mu(-))=(2.39+/-0.07+/-0.10)% are significantly larger than prior results. These new muonic branching fractions imply a narrower total decay width for the Upsilon(2S) and Upsilon(3S) resonances and lower other branching fractions that rely on these decays in their determination.
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117
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Adam NE, Alexander JP, Berkelman K, Cassel DG, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Pivarski J, Riley D, Rosner JL, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Wiss J, Edwards KW, Besson D, Gao KY, Gong DT, Kubota Y, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Mahmood AH, Severini H, Asner DM, Dytman SA, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cummings JP, Danko I, Napolitano J, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME. Observation of 1(-)0(-) final states from psi(2S) decays and e(+)e(-) annihilation. PHYSICAL REVIEW LETTERS 2005; 94:012005. [PMID: 15698072 DOI: 10.1103/physrevlett.94.012005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2004] [Indexed: 05/24/2023]
Abstract
Using CLEO data collected from CESR e(+)e(-) collisions at the psi(2S) resonance and nearby continuum at sqrt[s]=3.67 GeV, we report the first significantly nonzero measurements of light vector-pseudoscalar hadron pair production (including rhopi, omegapi, rhoeta, and K(*0)K0 ) and the pi(+)pi(-)pi(0) final state, both from psi(2S) decays and direct e(+)e(-) annihilation.
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Abstract
Abstract
Heavy oil recovery processes have traditionally used "once through" steam generators (OTSG) to produce high pressure steam for injection into geological formations containing heavy oil. The heat given up by the condensing steam fluidizes the heavy oil and allows the oil/water mixture to be brought to the surface. The oil is recovered as product and the water, referred to as produced water, is de-oiled and treated for feedwater to the OTSG. The typical treatment method for produced water is warm or hot lime softening (WLS or HLS), filtration, and weak acid cation exchange (WAC).
An alternative method of produced water treatment is vertical tube, falling film, vapour compression evaporation. This method:eliminates physical-chemical produced water treatment;results in lower life cycle costs;does not produce any softener sludge for disposal;minimizes the number and volume of waste streams requiring disposal;requires fewer maintenance materials and less maintenance labour;reduces the required amount of produced water de-oiling equipment;dramatically increases OTSG feed water quality, improving OTSG reliability; and,provides increased system availability and reliability. For steam assisted gravity drainage (SAGD) processes, which require 100% quality steam, it has the added advantage of producing water of sufficient quality for use in standard packaged boilers in lieu of OTSG. Packaged boilers are less expensive than OTSG, produce a much smaller liquid blowdown stream, and result in a boiler feed system which is 20% smaller than that of an OTSG.
Introduction
Heavy oil recovery requires large volumes of water commensurate in volume to the production of oil that it yields. Water is used in the form of steam to heat the geological formations that hold the oil. The oil is fluidized by the condensing steam and the oil/water mixture is pumped to the surface. The oil and water are separated. The oil is recovered as product and the water, referred to as produced water, is de-oiled and treated for reuse in the steam generator.
Traditionally, "once-through" steam generators (OTSG) have been used to produce 80% quality steam (80% vapour, 20% liquid) for injection into the well. A relatively new heavy oil recovery process, steam assisted gravity drainage (SAGD), requires 100% quality steam to be injected into the well (i.e., no liquid water). To produce 100% quality steam using OTSG, a series of vapour-liquid separators are required to separate the liquid water from the steam. The 100% quality steam is then injected into the well.
For both SAGD and non-SAGD applications, the produced water can generally be characterized as predominantly sodium chloride brine with high silica and minimal calcium and magnesium. High alkalinity, or carbonate, is present as well. The produced water generally contains about 4,000 mg/l total dissolved solids but can be much higher depending on the geological contribution. Dissolved and emulsified organics (oil) are present at a variety of levels, depending on the oil separation processes used.
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Bornheim A, Lipeles E, Pappas SP, Weinstein AJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Cassel DG, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Peterson D, Pivarski J, Riley D, Rosner JL, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J, Rubin P, Cawlfield C, Eisenstein BI, Gollin GD, Karliner I, Kim D, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Wiss J, Edwards KW, Besson D, Gao KY, Gong DT, Kubota Y, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Arms K, Gan KK, Severini H, Skubic P, Asner DM, Dytman SA, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cummings JP, Danko I, Napolitano J, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Mahmood AH, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M. Search for the lepton-flavor-violating leptonic B(0)-->mu(+/-)tau(-/+) and B(0)-->e(+/-)tau(-/+). PHYSICAL REVIEW LETTERS 2004; 93:241802. [PMID: 15697794 DOI: 10.1103/physrevlett.93.241802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/06/2004] [Indexed: 05/24/2023]
Abstract
We have searched a sample of 9.6 x 10(6) BB events for the lepton-flavor-violating leptonic B decays, B(0)-->mu(+/-)tau(-/+) and B(0)-->e(+/-)tau(-/+). The tau lepton was detected through the decay modes tau-->lnunu(-) , where l=e, mu. There is no indication of a signal, and we obtain the 90% confidence level upper limits B(B(0)-->mu(+/-)tau(-/+))<3.8 x 10(-5) and B(B(0)-->e(+/-)tau(-/+))<1.3 x 10(-4).
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Rubin P, Eisenstein BI, Gollin GD, Karliner I, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Besson D, Gao KY, Gong DT, Kubota Y, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Arms K, Eckhart E, Gan KK, Severini H, Skubic P, Asner DM, Dytman SA, Mehrabyan S, Mueller JA, Savinov V, Li Z, Lopez A, Mendez H, Ramirez J, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cummings JP, Danko I, Napolitano J, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Mahmood AH, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Bornheim A, Lipeles E, Pappas SP, Weinstein AJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Cassel DG, Duboscq JE, Ecklund KM, Ehrlich R, Fields L, Galik RS, Gibbons L, Gittelman B, Gray R, Gray SW, Hartill DL, Heltsley BK, Hertz D, Hsu L, Jones CD, Kandaswamy J, Kreinick DL, Kuznetsov VE, Mahlke-Krüger H, Meyer TO, Onyisi PUE, Patterson JR, Pedlar TK, Peterson D, Pivarski J, Riley D, Rosner JL, Ryd A, Sadoff AJ, Schwarthoff H, Shepherd MR, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Patel R, Potlia V, Stoeck H, Yelton J. First observation and Dalitz analysis of the D0-->K(0)Setapi(0) decay. PHYSICAL REVIEW LETTERS 2004; 93:111801. [PMID: 15447329 DOI: 10.1103/physrevlett.93.111801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2004] [Indexed: 05/24/2023]
Abstract
Using 9.0 fb(-1) of integrated luminosity in e(+)e(-) collisions near the Upsilon(4S) mass collected with the CLEO II.V detector we report the first observation of the decay D0-->K(0)(S)etapi(0). We measure the ratio of branching fractions, BR(D0-->K(0)(S)etapi(0))BR / (D0-->K(0)(S)pi(0))=0.46+/-0.07+/-0.06. We perform a Dalitz analysis of 155 selected D0-->K(0)(S)etapi(0) candidates and find leading contributions from a(0)(980)K(0)(S) and K(*)(892)eta intermediate states.
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Chopra I, Gnanalingham K, Pal D, Peterson D. A knot in the catheter--an unusual cause of ventriculo-peritoneal shunt blockage. Acta Neurochir (Wien) 2004; 146:1055-6; discussion 1056-7. [PMID: 15340821 DOI: 10.1007/s00701-004-0320-6] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A 25-year-old woman, who was 25 weeks pregnant, underwent insertion of a VP shunt for hydrocephalus, secondary to a bithalamic glioma. Two months later, she represented with symptoms of raised intracranial pressure and MR scan revealed increased ventricular size. On exploration of the shunt, manometry with saline confirmed blockage of the catheter distal to the valve. On re-opening the abdominal wound, the peritoneal catheter was found to be knotted, 2 cm from the end. This segment of the catheter was replaced, with resolution of symptoms, post-operatively. The present case illustrates that a knot in the peritoneal catheter is an extremely rare cause of shunt malfunction. Possible mechanisms underlying it are discussed.
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Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Haynes J, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Mahmood AH, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Weinstein AJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Boisvert V, Cassel DG, 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, Kuznetsov VE, Magerkurth A, Mahlke-Krüger H, Meyer TO, Patterson JR, Pedlar TK, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Eisenstein BI, Gollin GD, Karliner I, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Besson D, Gao KY, Gong DT, Kubota Y, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Arms K, Eckhart E, Gan KK, Gwon C, Severini H, Skubic P, Asner DM, Dytman SA, Mehrabyan S, Mueller JA, Nam S, Savinov V, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cummings JP, Danko I, Napolitano J, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH. Wess-Zumino current and the structure of the decay tau- -->K- pi- K+ nu tau. PHYSICAL REVIEW LETTERS 2004; 92:232001. [PMID: 15245150 DOI: 10.1103/physrevlett.92.232001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2003] [Indexed: 05/24/2023]
Abstract
We present the first study of the vector (Wess-Zumino) current in tau(-)-->K-pi-K+nu(tau) decay using data collected with the CLEO III detector at the Cornell Electron Storage Ring. We determine the quantitative contributions to the decay width from the vector and axial vector currents. Within the framework of a model by Kühn and Mirkes, we identify the quantitative contributions to the total decay rate from the intermediate states omegapi, rho(')pi, and K*K.
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Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Dambasuren E, Dorjkhaidav O, Mountain R, Muramatsu H, Nandakumar R, Skwarnicki T, Stone S, Wang JC, Mahmood AH, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Sun WM, Weinstein AJ, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Boisvert V, Cassel DG, 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, Kuznetsov VE, Magerkurth A, Mahlke-Krüger H, Meyer TO, Mistry NB, Patterson JR, Pedlar TK, 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, Eisenstein BI, Gollin GD, Karliner I, Lowrey N, Plager C, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Besson D, Gao KY, Gong DT, Kubota Y, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Ernst J, Arms K, Eckhart E, Gan KK, Gwon C, Severini H, Skubic P, Dytman SA, Mueller JA, Nam S, Savinov V, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Danko I. Observation of the Hadronic transitions chi(b1,2)(2P)-->omegaUpsilon(1S). PHYSICAL REVIEW LETTERS 2004; 92:222002. [PMID: 15245215 DOI: 10.1103/physrevlett.92.222002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2003] [Indexed: 05/24/2023]
Abstract
The CLEO Collaboration has made the first observations of hadronic transitions among bottomonium (bbmacr;) states other than the dipion transitions among Upsilon(nS) states. In our study of Upsilon(3S) decays, we find a significant signal for Upsilon(3S)-->gammaomegaUpsilon(1S) that is consistent with radiative decays Upsilon(3S)-->gammachi(b1,2)(2P), followed by chi(b1,2)(2P)-->omegaUpsilon(1S). The branching ratios we obtain are B[chi(b1)(2P)-->omegaUpsilon(1S)]=(1.63(+0.35+0.16)(-0.31-0.15))% and B[chi(b2)(2P)-->omegaUpsilon(1S)]=(1.10(+0.32+0.11)(-0.28-0.10))%, in which the first error is statistical and the second is systematic.
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Asner DM, Dytman SA, Mehrabyan S, Mueller JA, Nam S, Savinov V, Huang GS, Miller DH, Pavlunin V, Sanghi B, Shibata EI, Shipsey IPJ, Adams GS, Chasse M, Cummings JP, Danko I, Napolitano J, Cronin-Hennessy D, Park CS, Park W, Thayer JB, Thorndike EH, Coan TE, Gao YS, Liu F, Stroynowski R, Artuso M, Boulahouache C, Blusk S, Butt J, Dambasuren E, Dorjkhaidav O, Haynes J, Menaa N, Mountain R, Muramatsu H, Nandakumar R, Redjimi R, Sia R, Skwarnicki T, Stone S, Wang JC, Zhang K, Mahmood AH, Csorna SE, Bonvicini G, Cinabro D, Dubrovin M, Bornheim A, Lipeles E, Pappas SP, Shapiro A, Weinstein AJ, Mahapatra R, Nelson HN, Briere RA, Chen GP, Ferguson T, Tatishvili G, Vogel H, Watkins ME, Adam NE, Alexander JP, Berkelman K, Boisvert V, Cassel DG, 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, Kuznetsov VE, Magerkurth A, Mahlke-Krüger H, Meyer TO, Patterson JR, Pedlar TK, Peterson D, Pivarski J, Riley D, Sadoff AJ, Schwarthoff H, Shepherd MR, Sun WM, Thayer JG, Urner D, Wilksen T, Weinberger M, Athar SB, Avery P, Breva-Newell L, Potlia V, Stoeck H, Yelton J, Eisenstein BI, Gollin GD, Karliner I, Lowrey N, Naik P, Sedlack C, Selen M, Thaler JJ, Williams J, Edwards KW, Besson D, Gao KY, Gong DT, Kubota Y, Li SZ, Poling R, Scott AW, Smith A, Stepaniak CJ, Urheim J, Metreveli Z, Seth KK, Tomaradze A, Zweber P, Arms K, Eckhart E, Gan KK, Gwon C, Severini H, Skubic P. Observation of eta'c production in gammagamma fusion at CLEO. PHYSICAL REVIEW LETTERS 2004; 92:142001. [PMID: 15089529 DOI: 10.1103/physrevlett.92.142001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2003] [Indexed: 05/24/2023]
Abstract
We report on the observation of the eta(')(c)(2(1)S0), the radial excitation of the eta(c)(1(1)S0) ground state of charmonium, in the two-photon fusion reaction gammagamma-->eta(')(c)-->K(0)(S)K+/-pi(-/+) in 13.6 fb(-1) of CLEO II/II.V data and 13.1 fb(-1) of CLEO III data. We obtain M(eta(')(c))=3642.9+/-3.1(stat)+/-1.5(syst) MeV and M(eta(c))=2981.8+/-1.3(stat)+/-1.5(syst) MeV. The corresponding values of hyperfine splittings between 1S0 and 3S1 states are DeltaM(hf)(1S)=115.1+/-2.0 MeV and DeltaM(hf)(2S)=43.1+/-3.4 MeV. Assuming that the eta(c) and eta(')(c) have equal branching fractions to K(S)Kpi, we obtain Gamma(gammagamma)(eta(')(c))=1.3+/-0.6 keV.
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Saavedra-Lozano J, Cao Y, Callison J, Sarode R, Sodora D, Edgar J, Hatfield J, Picker L, Peterson D, Ramilo O, Vitetta ES. An anti-CD45RO immunotoxin kills HIV-latently infected cells from individuals on HAART with little effect on CD8 memory. Proc Natl Acad Sci U S A 2004; 101:2494-9. [PMID: 14983037 PMCID: PMC356978 DOI: 10.1073/pnas.0308381100] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
CD4+ CD45RO+ T cells are the major latent viral reservoir in HIV-infected individuals and hence a major obstacle in curing the disease. An anti-CD45RO immunotoxin (IT) can decrease the number of both productively and latently infected CD4+ T cells obtained from HIV-infected individuals with detectable viremia. In this study, we determined whether this IT could also kill latently infected replication-competent CD4+ T cells obtained from infected individuals without detectable plasma viremia. Our results demonstrate that ex vivo treatment with the anti-CD45RO IT significantly reduced the frequency of these cells. In contrast, the IT had only a modest effect on the cytomegalovirus-specific memory responses of CD8+ T cells. These results suggest that purging latent cells from infected individuals on highly active antiretroviral therapy with the anti-CD45RO IT might reduce the HIV latent reservoir without seriously compromising CD8+ T cell memory responses.
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