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Chen KF, Hara K, Hazumi M, Higuchi T, Miyabayashi K, Nakahama Y, Sumisawa K, Tajima O, Ushiroda Y, Yusa Y, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Aulchenko V, Aushev T, Aziz T, Bakich AM, Balagura V, Banerjee S, Barberio E, Barbero M, Bay A, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Garmash A, Gershon T, Go A, Gokhroo G, Goldenzweig P, Golob B, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kakuno H, Kang JH, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim SK, Kim YJ, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kusaka A, Kuzmin A, Kwon YJ, Leder G, Lee J, Lee MJ, Lesiak T, Li J, Limosani A, Lin SW, Liu Y, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Moloney GR, Murakami A, Nagamine T, Nagasaka Y, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ohshima T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park H, Pestotnik R, Piilonen LE, Sahoo H, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Singh JB, Sokolov A, Somov A, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Suzuki S, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Wedd R, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V, Zupanc A. Observation of time-dependent CP violation in B0 --> eta'K0 decays and improved measurements of CP asymmetries in B0 --> phiK0, KS0KS0KS0 and B0 --> J/psiK0 decays. PHYSICAL REVIEW LETTERS 2007; 98:031802. [PMID: 17358677 DOI: 10.1103/physrevlett.98.031802] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/02/2006] [Indexed: 05/14/2023]
Abstract
We present improved measurements of CP-violation parameters in B(0) --> phiK(0), eta(')K(0), KS(0)KS(0)KS(0) decays based on a sample of 535 x 10(6) BB pairs collected at the Upsilon(4S) resonance with the Belle detector at the KEKB energy-asymmetric e(+)e(-) collider. We obtain sin2phi1(eff)=+0.64+/-0.10(stat)+/-0.04(syst) for B(0) --> eta(')K(0), +0.50+/-0.21(stat)+/-0.06(syst) for B(0) --> phiK(0), and +0.30+/-0.32(stat)+/-0.08(syst) for B(0) --> KS(0)KS(0)KS(0) decays. We have observed CP violation in the B(0) --> eta(')K(0) decay with a significance of 5.6 standard deviations. We also perform an improved measurement of CP asymmetries in B(0) --> J/psiK(0) decays and obtain sin2phi1=+0.642+/-0.031(stat)+/-0.017(syst).
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102
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Ohshima N, Chinzei M, Mizuno K, Hayashida M, Kitamura T, Shibuya H, Hanaoka K. Transient decreases in Bispectral Index without associated changes in the level of consciousness during photic stimulation in an epileptic patient. Br J Anaesth 2007; 98:100-4. [PMID: 17098723 DOI: 10.1093/bja/ael309] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
This case report describes a patient with a history of epileptic seizures who showed unusual decreases in the Bispectral Index (BIS) attributable to the induction of abnormal slow electroencephalographic (EEG) waves by photic stimulation, without any associated decrease in his level of consciousness. After starting anticonvulsive therapy, photic stimulation no longer induced abnormal EEG activity nor decreased BIS values. These findings suggest that BIS values may not accurately reflect a patient's actual level of consciousness in the presence of epilepsy-related abnormal EEG activity and that the BIS monitor may be able to track such EEG changes.
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Ikado K, Abe K, Abe K, Adachi I, Aihara H, Akai K, Akemoto M, Anipko D, Arinstein K, Aulchenko V, Aushev T, Aziz T, Bakich AM, Balagura V, Barbero M, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chen A, Chen WT, Choi Y, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Epifanov D, Flanagan J, Fratina S, Furukawa K, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha H, Haba J, Hara K, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Iida N, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kamitani T, Kang JH, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kikutani E, Kim HJ, Kim HO, Kinoshita K, Koiso H, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee J, Lesiak T, Limosani A, Lin SW, Liventsev D, Marlow D, Matsumoto T, Matyja A, McOnie S, Michizono S, Mimashi T, Mitaroff W, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Nagamine T, Nakamura I, Nakamura TT, Nakano E, Nakao M, Nishida S, Nitoh O, Noguchi S, Nozaki T, Ogawa S, Ogawa Y, Ohmi K, Ohshima T, Ohuchi N, Oide K, Okabe T, Okuno S, Olsen SL, Onuki Y, Ostrowicz W, Ozaki H, Pakhlov P, Park CW, Park H, Pestotnik R, Piilonen LE, Poluektov A, Rozanska M, Sakai Y, Schietinger T, Schneider O, Schwanda C, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shidara T, Shwartz B, Sidorov V, Sokolov A, Somov A, Stanic S, Staric M, Stoeck H, Sumisawa K, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Tawada M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Yoshida M, Yusa Y, Zhang LM, Zhang ZP, Zhilich V, Zürcher D. Evidence of the purely leptonic decay B- --> tau- nu(tau). PHYSICAL REVIEW LETTERS 2006; 97:251802. [PMID: 17280341 DOI: 10.1103/physrevlett.97.251802] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2006] [Revised: 10/18/2006] [Indexed: 05/13/2023]
Abstract
We present the first evidence of the decay B- --> tau- nu(tau), using 414 fb(-1) of data collected at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider. Events are tagged by fully reconstructing one of the B mesons in hadronic modes. We detect the signal with a significance of 3.5 standard deviations including systematics and measure the branching fraction to be B(B- --> tau- nu(tau)) = (1.79(-0.49) +0.56(stat)(-0.51) +0.46(syst)) x 10(-4). This implies that fB = 0.229(-0.031) +0.036(stat)(-0.037) +0.034(syst) GeV and is the first direct measurement of this quantity.
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104
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Gabyshev N, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aulchenko V, Aushev T, Bakich AM, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Enari Y, Fratina S, Gershon T, Gokhroo G, Golob B, Gorisek A, Hara T, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kang JS, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kim SK, Kim SM, Kinoshita K, Korpar S, Krokovny P, Kumar S, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lesiak T, Lin SW, Mandl F, Matsumoto T, Mikami Y, Mitaroff W, Miyake H, Miyata H, Mizuk R, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Palka H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sagawa H, Sakai Y, Sato N, Schietinger T, Schneider O, Schwartz AJ, Senyo K, Seuster R, Sevior ME, Shibuya H, Sidorov V, Singh JB, Somov A, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki SY, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Teramoto Y, Tian XC, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CH, Wang MZ, Xie QL, Yabsley BD, Yamaguchi A, Yamamoto H, Yamashita Y, Yamauchi M, Yang H, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V, Zontar D. Study of decay mechanisms in B--->Lambdac+ppi- decays and observation of low-mass structure in the Lambdac+p system. PHYSICAL REVIEW LETTERS 2006; 97:242001. [PMID: 17280269 DOI: 10.1103/physrevlett.97.242001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2005] [Indexed: 05/13/2023]
Abstract
Using a sample of 152 x 10(6) BB pairs accumulated with the Belle detector at the KEKB e+e- collider, we study the decay mechanism of three-body charmed decay B- --> Lambdac+ ppi-. The intermediate two-body decay B--->Sigmac (2455)0 p is observed for the first time with a branching fraction of (3.7 +/- 0.7 +/- 0.4 +/- 1.0) x 10(-5) and a statistical significance of 8.4sigma. We also observe a low-mass enhancement in the (Lambdac+p) system, which can be parametrized as a Breit-Wigner function with a mass of (3.35(-0.02)(+0.01) +/-0.02) GeV/c2 and a width of (0.07(-0.03)(+0.04) +/-0.04) GeV/c2. We measure its branching fraction to be (3.9(-0.7)(+0.8) +/- 0.4 +/- 1.0) x 10(-5) with a statistical significance of 6.2sigma. The errors are statistical, systematic, and that of the Lambdac+-->pK- pi+ decay branching fraction.
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105
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Gabyshev N, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barberio E, Bartel W, Bay A, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chen A, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Garmash A, Gershon T, Gokhroo G, Golob B, Haba J, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Ikado K, Imoto A, Inami K, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kawasaki T, Khan HR, Kichimi H, Kim SM, Korpar S, Krokovny P, Kulasiri R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lesiak T, Lin SW, Liventsev D, Majumder G, Matsumoto T, Mitaroff W, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Nakano E, Nakao M, Natkaniec Z, Nishida S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ozaki H, Palka H, Park CW, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Sato N, Satoyama N, Schietinger T, Schneider O, Schwanda C, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Watanabe Y, Won E, Xie QL, Yamaguchi A, Yamauchi M, Ying J, Zhang ZP. Observation of B+ --> Lambda c+ Lambda c- K+ and B0 --> Lambda c+ Lambda c- K0 decays. PHYSICAL REVIEW LETTERS 2006; 97:202003. [PMID: 17155677 DOI: 10.1103/physrevlett.97.202003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Indexed: 05/12/2023]
Abstract
We report the first measurements of the doubly charmed baryonic B decays B --> Lambda c+ Lambda c- K. The B+ --> Lambda c+ Lambda c- K+ decay is observed with a branching fraction of (6.5(-0.9)(+1.0)+/-1.1+/-3.4)x10(-4) and a statistical significance of 15.4sigma. The B0 --> Lambda c+ Lambda c- K0 decay is observed with a branching fraction of (7.9(-2.3)(+2.9)+/-1.2+/-4.1)x10(-4) and a statistical significance of 6.6sigma. The branching fraction errors are statistical, systematic, and the error resulting from the uncertainty of the Lambda c+ --> pK- pi+ decay branching fraction. The analysis is based on 357 fb(-1) of data accumulated at the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.
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106
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Kishino M, Shibuya H, Yoshimura R, Miura SM, Watanabe H. A retrospective analysis of the use of brachytherapy in relation to early stage squamous cell carcinoma of the oropharynx and its relationship to second primary respiratory and upper digestive tract cancers. Br J Radiol 2006; 80:121-5. [PMID: 17092957 DOI: 10.1259/bjr/69420116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The purpose of this study was to retrospectively evaluate brachytherapy for early stage squamous cell carcinoma of the oropharynx (SCO) in relation to second primary respiratory and upper digestive tract cancers (RUDT). Between 1976 and 2001, 111 previously untreated patients with stage I or II SCO were treated with Au-198 seed brachytherapy alone (36 cases) or Au-198 seed brachytherapy plus external irradiation (75 cases). Of the 111 patients, 28 patients had stage I disease and 83 patients had stage II disease. Each patient was evaluated for therapeutic efficacy, post-treatment quality of life (QOL) and a second cancer. The 5-year and 10-year cause-specific actuarial survival rates for stage I and II SCO were 87% and 86%, respectively. We found that the 5-year and 10-year survival rates for all SCOs combined with second primary RUDT cancers were 71% and 45%, respectively. 51 second primary RUDT cancers occurred successively in 41 patients following treatment for early stage oropharyngeal cancer and this was the sole prognostic factor by the multivariate analysis. Au-198 seed brachytherapy with or without ipsilateral external irradiation of up to 30 Gy was associated with fewer late complications in the oral cavity and salivary gland. We concluded that our treatment policy of brachytherapy with or without external irradiation for patients with early stage SCO was effective and acceptable from the standpoint of tumour control and post-treatment QOL.
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107
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Chistov R, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee J, Lesiak T, Lin SW, Liventsev D, Mandl F, Marlow D, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nagamine T, Nakano E, Nakao M, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Pakhlova G, Palka H, Park H, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Schietinger T, Schneider O, Schwartz AJ, Seidl R, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Singh JB, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Suzuki S, Takasaki F, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tikhomirov I, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Won E, Wu CH, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang LM, Zhang ZP. Observation of new states decaying into Lambda(c)(+)Kappa(-)pi(+) and Lambda(c)(+)Kappa(0)/(s)pi(-). PHYSICAL REVIEW LETTERS 2006; 97:162001. [PMID: 17155385 DOI: 10.1103/physrevlett.97.162001] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2006] [Indexed: 05/12/2023]
Abstract
We report the first observation of two charmed strange baryons that decay into Lambda(c)(+)Kappa(-)pi(+). The broader of the two states is measured to have a mass of 2978.5+/-2.1+/-2.0 MeV/c2 and a width of 43.5+/-7.5+/-7.0 MeV/c2. The mass and width of the narrow state are measured to be 3076.7+/-0.9+/-0.5 MeV/c;{2} and 6.2+/-1.2+/-0.8 MeV/c2, respectively. We also perform a search for the isospin partner states that decay into Lambda(c)(+)Kappa(0)/(s)pi(-) and observe a significant signal at the mass of 3082.8+/-1.8+/-1.5 MeV/c2. The data used for this analysis were accumulated at or near the Upsilon(4S) resonance, using the Belle detector at the e+ e- asymmetric-energy collider KEKB. The integrated luminosity of the data sample used is 461.5 fb(-1).
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108
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Gokhroo G, Majumder G, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Aushev T, Aziz T, Bakich AM, Balagura V, Banerjee S, Belous K, Bitenc U, Bizjak I, Blyth S, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Fratina S, Gershon T, Go A, Golob B, Gorisek A, Ha H, Haba J, Hayasaka K, Hazumi M, Heffernan D, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kawai H, Kawasaki T, Kichimi H, Kim HO, Kim YJ, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kwon YJ, Lange JS, Leder G, Lesiak T, Lin SW, Liventsev D, Mandl F, Matsumoto T, McOnie S, Mitaroff W, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nagamine T, Nagasaka Y, Nakao M, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Pakhlov P, Palka H, Pestotnik R, Piilonen LE, Sakai Y, Sarangi TR, Schietinger T, Schneider O, Seidl R, Senyo K, Shapkin M, Shibuya H, Sidorov V, Singh JB, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sugiyama A, Sumiyoshi T, Takasaki F, Tanaka M, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Usov Y, Varner G, Villa S, Wang CH, Wang MZ, Watanabe Y, Won E, Wu CH, Yamaguchi A, Yamashita Y, Yamauchi M, Zhang CC, Zhang ZP, Zhilich V. Observation of a near-threshold D(0)D[over](0)pi(0) enhancement in B-->D(0)D[over](0)pi(0)Kappa decay. PHYSICAL REVIEW LETTERS 2006; 97:162002. [PMID: 17155386 DOI: 10.1103/physrevlett.97.162002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2006] [Indexed: 05/12/2023]
Abstract
We report the first observation of a near-threshold enhancement in the D(0)D[over](0)pi(0) system from B-->D(0)D[over](0)pi(0)Kappa decays using a 414 fb(-1) data sample collected at the Upsilon(4S) resonance. The enhancement peaks at a mass M=3875.2+/-0.7(+0.3)/(-1.6) +/-0.8 MeV/c2 and the branching fraction for events in the peak is B(B-->D(0)D[over](0)pi(0)Kappa)=(1.22+/-0.31(+0.23)/(-0.30))x10(-4). The data were collected with the Belle detector at the KEKB energy-asymmetric e+ e- collider.
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109
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Wu CH, Wang MZ, Abe K, Adachi I, Aihara H, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Balagura V, Bay A, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Browder TE, Chao Y, Chen A, Chen WT, Cheon BG, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Gabyshev N, Gershon T, Go A, Gokhroo G, Gorisek A, Ha H, Haba J, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Hokuue T, Hou S, Hou WS, Hsiung YB, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kim YJ, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee J, Lee YJ, Lesiak T, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Pakhlov P, Palka H, Park H, Park KS, Pestotnik R, Piilonen LE, Sakai Y, Schietinger T, Schneider O, Schwartz AJ, Seidl R, Sevior ME, Shapkin M, Shibuya H, Sidorov V, Sokolov A, Somov A, Soni N, Stanic S, Staric M, Stoeck H, Sumiyoshi T, Takasaki F, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Zhang LM, Zhang ZP. Study of J/psi-->pp[over],LambdaLambda[over] and observation of eta(c)-->LambdaLambda[over] at Belle. PHYSICAL REVIEW LETTERS 2006; 97:162003. [PMID: 17155387 DOI: 10.1103/physrevlett.97.162003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2006] [Indexed: 05/12/2023]
Abstract
We study the baryonic charmonium decays of B mesons B+-->etacK+ and B+-->J/psiK+, where the etac and J/psi subsequently decay into a pp[over] or LambdaLambda[over] pair. We measure the J/psi-->pp[over] and LambdaLambda[over] anisotropy parameters alphaB=-0.60+/-0.13+/-0.14 (pp[over]), -0.44+/-0.51+/-0.31 (LambdaLambda[over ]) and compare to results from e;{+}e;{-}-->J/psi formation experiments. We also report the first observation of etac-->LambdaLambda[over]. The measured branching fraction is B(etac-->LambdaLambda[over ])=(0.87(+0.24)/(-0.21)(stat)(+0.09/-0.14) (syst)+/-0.27(PDG))x10-3. This study is based on a 357 fb-1 data sample recorded on the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+ e- collider.
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Krokovny P, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barberio E, Bay A, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Browder TE, Chao Y, Chen A, Chen WT, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gershon T, Go A, Gorisek A, Ha H, Hayasaka K, Hayashii H, Hazumi M, Heffernan D, Higuchi T, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim SM, Kinoshita K, Korpar S, Krizan P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lee J, Lesiak T, Li J, Lin SW, Majumder G, Matsumoto T, McOnie S, Mitaroff W, Miyabayashi K, Miyazaki Y, Mori T, Nakamura I, Nakao M, Nishida S, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Ozaki H, Pakhlov P, Park CW, Park H, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Rozanska M, Sakai Y, Sarangi TR, Sato N, Satoyama N, Schietinger T, Schneider O, Senyo K, Shibuya H, Shwartz B, Singh JB, Sokolov A, Somov A, Soni N, Stamen R, Staric M, Stoeck H, Sumisawa K, Tajima O, Takasaki F, Tamai K, Tanaka M, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Ueno K, Uno S, Urquijo P, Ushiroda Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang LM, Zhang ZP, Zhilich V. Measurement of the quark mixing parameter cos2phi1 using time-dependent Dalitz analysis of B0 -->D[KS(0)pi + pi-]h0. PHYSICAL REVIEW LETTERS 2006; 97:081801. [PMID: 17026290 DOI: 10.1103/physrevlett.97.081801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2006] [Indexed: 05/12/2023]
Abstract
We present a measurement of the angle phi1 of the Cabibbo-Kobayashi-Maskawa unitarity triangle using a time-dependent Dalitz analysis of D-->KS(0)pi + pi- decays produced in neutral B meson decay to a neutral D meson and a light meson (B0-->D*h0). The method allows a direct extraction of 2phi1 and, therefore, helps to resolve the ambiguity between 2phi1 and pi-2phi1 in the measurement of sin2phi1. We obtain sin2phi1= 0.78 +/- 0.44 +/- 0.22 and cos2varphi1 = 1.87(-0.53-0.32)(+0.40 + 0.22). The sign of cos2phi1 is determined to be positive at 98.3% C.L.
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Schümann J, Wang CH, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Asano Y, Aushev T, Bakich AM, Balagura V, Barberio E, Barbero M, Bay A, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha HC, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim SK, Kim SM, Kinoshita K, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Lee J, Lesiak T, Limosani A, Liventsev D, MacNaughton J, Majumder G, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Mori T, Nagamine T, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sakai Y, Sarangi TR, Sato N, Schietinger T, Schneider O, Schwanda C, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Sokolov A, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Suzuki S, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Villa S, Wang CC, Wang MZ, Watanabe Y, Won E, Xie QL, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yusa Y, Zhang CC, Zhang LM, Zhang ZP, Zhilich V, Zürcher D. Evidence for B-->eta'pi and improved measurements for B-->eta'K. PHYSICAL REVIEW LETTERS 2006; 97:061802. [PMID: 17026158 DOI: 10.1103/physrevlett.97.061802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2006] [Indexed: 05/12/2023]
Abstract
We report evidence for the exclusive two-body charmless hadronic B meson decay B-->eta'pi, and improved measurements of B-->eta'K. The results are obtained from a data sample of 386x10(6) BB pairs collected at the Upsilon(4S) resonance, with the Belle detector at the KEKB asymmetric-energy e+e- collider. We measure B(B+-->eta'pi+)=[1.76(-0.62)(+0.67)(stat)(-0.14)(+0.15)(syst)]x10(-6) and B(B0-->eta'pi0)=[2.79(-0.96)(+1.02)(stat)(-0.34)(+0.25)(syst)]x10(-6). We also find the ratio of B(B+-->eta'K+)/B(B0-->eta'K0)=1.17+/-0.08(stat)+/-0.03(syst) and measure the direct CP asymmetries for the charged modes.
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112
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Widhalm L, Abe K, Abe K, Adachi I, Aihara H, Arinstein K, Asano Y, Aushev T, Bakich AM, Balagura V, Barberio E, Barbero M, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chen A, Chen WT, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Golob B, Gorisek A, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Ikado K, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kakuno H, Kang JH, Kapusta P, Kataoka SU, Kawai H, Kawasaki T, Khan HR, Kim HJ, Kim HO, Kinoshita K, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kwon YJ, Lange JS, Leder G, Lee J, Lesiak T, Li J, Limosani A, Lin SW, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyata H, Miyazaki Y, Mohapatra D, Nakamura I, Natkaniec Z, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Pakhlov P, Park CW, Peak LS, Pestotnik R, Piilonen LE, Sakai Y, Sato N, Satoyama N, Sayeed K, Schietinger T, Schneider O, Schwanda C, Schwartz AJ, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Somov A, Stamen R, Stanic S, Staric M, Stoeck H, Suzuki SY, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Won E, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Zhang LM, Zhang ZP, Zürcher D. Measurement of D0-->pilnu(Klnu) form factors and absolute branching fractions. PHYSICAL REVIEW LETTERS 2006; 97:061804. [PMID: 17026160 DOI: 10.1103/physrevlett.97.061804] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2006] [Revised: 07/12/2006] [Indexed: 05/12/2023]
Abstract
Using a 282 fb-1 data sample collected by the Belle experiment at the KEKB e+e- collider, we study D0 decays to K-l+nu and pi-l+nu final states. The D0 flavor and momentum are tagged through a full reconstruction of the recoiling charm meson and additional mesons from fragmentation. The reconstruction method provides very good resolution in neutrino momentum and in q2=(pl+pnu)2. Normalizing to the total number of D0 tags, we measure the absolute branching fractions to be B(D0-->Klnu)=(3.45+/-0.07stat+/-0.20syst)% and B(D0-->pilnu)=(0.255+/-0.019stat+/-0.016syst)% and the semileptonic form factors (within the modified pole model) f+K(0)=0.695+/-0.007stat+/-0.022syst and f+pi(0)=0.624+/-0.020stat+/-0.030syst.
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Waguri N, Furukawa K, Shobugawa K, Takizawa K, Ikeda H, Iwamoto Y, Aiba T, Yoneyama O, Igarashi K, Tsukioka S, Yabe M, Kuwabara S, Shibuya H. [A case of gastric cancer with abdominal wall invasion treated by weekly low-dose paclitaxel therapy]. Gan To Kagaku Ryoho 2006; 33:1151-4. [PMID: 16912538] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Here we report a case of gastric cancer with diffuse abdominal wall invasion treated with weekly low-dose paclitaxel therapy. A 62-year-old male visited our hospital because of abdominal distention, prepubic tumor,and testicular hydrocele. Computed tomography revealed diffuse swelling of the abdominal wall and hydronephrosis of the right kidney. Upper gastrointestinal endoscopy demonstrated type 3' advanced gastric cancer. Pathological diagnosis of both gastric tumor and abdominal wall biopsy specimens was poorly-differentiated adenocarcinoma containing signet ring cell carcinoma. Low-dose paclitaxel (90 mg/body) was given once a week for 3 weeks. Abdominal wall swelling like cuirass disappeared after 2 courses of low-dose paclitaxel therapy. Nine repeated courses of this regimen have been given until now; the relapse of the abdominal wall invasion has not become apparent, and primary gastric lesion has been a stable disease. Diffuse abdominal wall invasion of gastric cancer like cuirass without ascites is a rare condition, and low-dose paclitaxel was very effective for this condition.
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Garmash A, Abe K, Abe K, Adachi I, Aihara H, Asano Y, Aushev T, Aziz T, Bahinipati S, Bakich AM, Barbero M, Bedny I, Bitenc U, Bizjak I, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang P, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Choi YK, Chuvikov A, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha HC, Hara T, Hasegawa Y, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim SK, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kuo CC, Kuzmin A, Kwon YJ, Lee SE, Lesiak T, Limosani A, Lin SW, Liventsev D, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Nagamine T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ozaki H, Park CW, Park H, Park KS, Peak LS, Pestotnik R, Piilonen LE, Rozanska M, Sakai Y, Satoyama N, Schietinger T, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Sevior ME, Shibuya H, Shwartz B, Singh JB, Somov A, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Suzuki SY, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Uno S, Urquijo P, Varner G, Varvell KE, Villa S, Wang CH, Wang MZ, Watanabe Y, Won E, Xie QL, Yamaguchi A, Yamauchi M, Yang H, Zhang LM, Zhang ZP, Zhilich V, Zürcher D. Evidence for large direct CP violation in B+/- --> rho(770)0K+/- from analysis of three-body charmless B+/- --> K+/-pi+/-pi+/- decays. PHYSICAL REVIEW LETTERS 2006; 96:251803. [PMID: 16907296 DOI: 10.1103/physrevlett.96.251803] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/27/2005] [Indexed: 05/11/2023]
Abstract
We report results on a Dalitz analysis of three-body charmless B+/- --> K+/-pi+/-pi+/- decay including searches for direct CP violation. We report the first observation of the decay B+/- --> f2(1270)K+/- with a statistical significance above 6sigma. We also observe first evidence for large direct CP violation in the B+/- --> rho(770)0K+/- channel. The results are obtained with a data sample that contains 386 10(6) BB pairs collected at the Y(4s) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
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115
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Ishikawa A, Abe K, Adachi I, Aihara H, Anipko D, Asano Y, Aushev T, Bakich AM, Balagura V, Barbero M, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang P, Chao Y, Chen A, Cheon BG, Choi Y, Choi YK, Chuvikov A, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Gorisek A, Ha H, Haba J, Hara T, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Inami K, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kataoka SU, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim SK, Kim SM, Kinoshita K, Korpar S, Krizan P, Kulasiri R, Kumar R, Kuo CC, Kwon YJ, Lee J, Lee SE, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, Majumder G, Mandl F, Matsumoto T, Matyja A, McOnie S, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Nagamine T, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ohshima T, Okabe T, Okuno S, Olsen SL, Onuki Y, Ozaki H, Park CW, Pestotnik R, Piilonen LE, Rozanska M, Sakai Y, Sato N, Satoyama N, Schietinger T, Schneider O, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Somov A, Soni N, Stamen R, Stanic S, Staric M, Stoeck H, Sumisawa K, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsukamoto T, Uehara S, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yusa Y, Zhang J, Zhang LM, Zhang ZP. Measurement of forward-backward asymmetry and Wilson coefficients in B --> K*l+l-. PHYSICAL REVIEW LETTERS 2006; 96:251801. [PMID: 16907294 DOI: 10.1103/physrevlett.96.251801] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/08/2006] [Indexed: 05/11/2023]
Abstract
We report the first measurement of the forward-backward asymmetry and the ratios of Wilson coefficients and in A9/A7 and A10/A7 in B --> K*l+l-, where l represents an electron or a muon. We find evidence for the forward-backward asymmetry with a significance of 3.4sigma. The results are obtained from a data sample containing 386 x 10(6) BB pairs that were collected on the Y(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider.
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Seidl R, Hasuko K, Abe K, Adachi I, Aihara H, Anipko D, Asano Y, Aushev T, Bakich AM, Balagura V, Barberio E, Bartel W, Bay A, Bitenc U, Bizjak I, Blyth S, Bozek A, Bracko M, Browder TE, Chang P, Chen A, Cheon BG, Choi Y, Choi YK, Chuvikov A, Dalseno J, Danilov M, Dash M, Dragic J, Eidelman S, Fratina S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Grosse Perdekamp M, Ha HC, Hayasaka K, Hayashii H, Hazumi M, Hokuue T, Hoshi Y, Hou S, Hou WS, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kapusta P, Katayama N, Kawai H, Kawasaki T, Khan HR, Kichimi H, Kim SK, Kim SM, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Lee J, Lesiak T, Li J, Limosani A, Lin SW, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mori T, Nakamura I, Nakano E, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Ogawa A, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Palka H, Park CW, Park H, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Sakai Y, Sato N, Satoyama N, Schietinger T, Schneider O, Schümann J, Senyo K, Sevior ME, Shapkin M, Shibuya H, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Takasaki F, Tamai K, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Tsukamoto T, Uehara S, Uglov T, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yusa Y, Zhang LM, Zhang ZP, Zhilich V, Zürcher D. Measurement of azimuthal asymmetries in inclusive production of hadron pairs in e(+)e(-) annihilation at Belle. PHYSICAL REVIEW LETTERS 2006; 96:232002. [PMID: 16803372 DOI: 10.1103/physrevlett.96.232002] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2006] [Indexed: 05/10/2023]
Abstract
The Collins effect connects transverse quark spin with a measurable azimuthal dependence in the yield of hadronic fragments around the quark's momentum vector. Using two different reconstruction methods, we find evidence of statistically significant azimuthal asymmetries for charged pion pairs in e(+)e(-) annihilation at a center-of-mass energy of 10.52 GeV, which can be attributed to a transverse polarization of the primordial quarks. The measurement was performed using a sample of 79 x 10(6) hadronic events collected with the Belle detector.
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Mohapatra D, Nakao M, Nishida S, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Asano Y, Aulchenko V, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barbero M, Bedny I, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chao Y, Chen A, Chen KF, Chen WT, Cheon BG, Chistov R, Choi Y, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Gershon T, Gokhroo G, Golob B, Gorisek A, Ha HC, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hokuue T, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Imoto A, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kataoka SU, Katayama N, Kawasaki T, Khan HR, Kichimi H, Kim HJ, Kim HO, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee J, Lesiak T, Limosani A, Lin SW, Liventsev D, Majumder G, Mandl F, Marlow D, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Moloney GR, Mori T, Nakano E, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ozaki H, Pakhlov P, Palka H, Park CW, Parslow N, Peak LS, Pestotnik R, Piilonen LE, Poluektov A, Ronga FJ, Rozanska M, Sakai Y, Sarangi TR, Sato N, Schietinger T, Schneider O, Schümann J, Schwanda C, Schwartz AJ, Seidl R, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Sokolov A, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Varvell KE, Villa S, Wang CC, Wang CH, Wang MZ, Watanabe Y, Wicht J, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamashita Y, Yamauchi M, Ying J, Yusa Y, Zhang LM, Zhang ZP, Zhilich V, Zürcher D. Observation of b-->dgamma and determination of /Vtd/Vts/. PHYSICAL REVIEW LETTERS 2006; 96:221601. [PMID: 16803300 DOI: 10.1103/physrevlett.96.221601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2006] [Indexed: 05/10/2023]
Abstract
We report the observation of the flavor-changing neutral current process b-->dgamma using a sample of 386 x 106 B meson pairs accumulated by the Belle detector at the KEKB e+e- collider. We measure branching fractions for the exclusive modes B--->rho-gamma, B0rho0gamma, and B0omegagamma. Assuming that these three modes are related by isospin, we find B(B-->(rho,gamma)gamma)=[Formula: See Text] with a significance of 5.1sigma. This result is used to determine the ratio of Cabibbo-Kobayashi-Maskawa matrix elements /Vtd/Vts/ to be [Formula: See Text].
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Shirai W, Sato T, Shibuya H, Naito K, Tsukise A. Anatomicopathological Study of Vascular and Biliary Systems Using Cast Samples of Fasciola-infected Bovine Livers. ACTA ACUST UNITED AC 2006; 53:239-45. [PMID: 16737513 DOI: 10.1111/j.1439-0442.2006.00821.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022]
Abstract
In 117 livers with fascioliasis, this study was focused on the number of Fasciola, the number and intrahepatic localization of affected hepatic ducts and bile ducts, and the degree of fibrosis in the hepatic segments and bile ducts. The degree of pathological changes in bile ducts caused by fascioliasis was classified into five levels. The site of Fasciola habitation was most often the hepatic ducts of the porta hepatis: it was the left hepatic duct in 101 livers and the right hepatic duct in 88 livers. Casts were prepared by infusing synthetic resin into the hepatic arterial, portal, hepatic venous and biliary systems of 15 bovine livers with fascioliasis and then examined. In the left lobe, quadrate lobe, and caudate process where atrophic fibrosis was noted, the bile ducts became rod-shaped by losing branches, and the samples resembled dead branches of liver. Portal branches were thinned or completely terminated with marked fibrosis. Fine and irregular newly formed bile ducts not parallel with portal branches were observed in livers with markedly chronic fascioliasis. Distal portal branches in the right lobe, caudate lobe, and papillary process showed hypertrophic proliferative changes. The arterial system was generally well developed in thickened walls of bile ducts and formed vascular beds, and surrounded the bile ducts as tubes. In livers with severe fibrosis, capillaries were markedly developed and resembled glass cotton.
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Somov A, Schwartz AJ, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Asano Y, Aulchenko V, Aushev T, Aziz T, Bahinipati S, Bakich AM, Balagura V, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Dash M, Dragic J, Drutskoy A, Eidelman S, Epifanov D, Gabyshev N, Garmash A, Gershon T, Go A, Gokhroo G, Golob B, Hara K, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim SK, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kuo CC, Kusaka A, Kuzmin A, Kwon YJ, Leder G, Lesiak T, Li J, Limosani A, Lin SW, Macnaughton J, Mandl F, Marlow D, Matsumoto T, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Nagasaka Y, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Noguchi S, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Palka H, Park CW, Park H, Pestotnik R, Piilonen LE, Poluektov A, Sakai Y, Sarangi TR, Sato N, Schietinger T, Schneider O, Schwanda C, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Sokolov A, Soni N, Stanic S, Staric M, Sumiyoshi T, Suzuki S, Tajima O, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Ushiroda Y, Usov Y, Varner G, Villa S, Wang CH, Wang MZ, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamauchi M, Ying J, Zhang LM, Zhang ZP, Zhilich V. Measurement of the branching fraction, polarization, and asymmetry for decays, and determination of the Cabibbo-Kobayashi-Maskawa phase. PHYSICAL REVIEW LETTERS 2006; 96:171801. [PMID: 16712287 DOI: 10.1103/physrevlett.96.171801] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2006] [Indexed: 05/09/2023]
Abstract
We have measured the branching fraction , longitudinal polarization fraction f(L), and CP asymmetry coefficients A and S for B(0) --> rho(+) rho(-) decays with the Belle detector at the KEKB e(+) e(-) collider using 253 Fb(-1) of data. We obtain B = [22.8 +/- 3.8(stat)(+2.3)(-2.6)(syst)] x 10(-6), f(L) = 0.941 (+0.034)(-0.040)(stat) +/- 0.030(syst). A = 0.00 +/- 0.30(stat) +/- 0.09(syst) and S = 0.08 +/- 0.09(syst). These values are used to constrain the Cabibbo-Kobayashi-Maskawa phase ; the solution consistent with the standard model is phi(2) = (88 +/- 17) degrees or 59 degrees < phi(2) < 115 degrees at 90% C.L.
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Zhang LM, Zhang ZP, Li J, Abe K, Abe K, Adachi I, Aihara H, Anipko D, Arinstein K, Asano Y, Aushev T, Bahinipati S, Bakich AM, Balagura V, Barbero M, Bay A, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Brodzicka J, Browder TE, Chang MC, Chang P, Chao Y, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Cole S, Dalseno J, Danilov M, Dash M, Drutskoy A, Eidelman S, Gabyshev N, Gershon T, Go A, Gokhroo G, Golob B, Gorisek A, Ha HC, Haba J, Hara T, Hastings NC, Hayasaka K, Hayashii H, Hazumi M, Hoshi Y, Hou S, Hou WS, Hsiung YB, Iijima T, Ikado K, Inami K, Ishikawa A, Ishino H, Itoh R, Iwasaki M, Iwasaki Y, Kang JH, Kapusta P, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim SK, Kim SM, Kinoshita K, Korpar S, Krizan P, Krokovny P, Kulasiri R, Kumar R, Kuo CC, Kuzmin A, Kwon YJ, Leder G, Lee J, Lesiak T, Lin SW, Liventsev D, Mandl F, Matsumoto T, Mikami Y, Mitaroff W, Miyabayashi K, Miyake H, Miyata H, Miyazaki Y, Mizuk R, Mohapatra D, Mori T, Nakao M, Natkaniec Z, Nishida S, Nitoh O, Nozaki T, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Ostrowicz W, Ozaki H, Park CW, Park H, Pestotnik R, Piilonen LE, Sakai Y, Sato N, Satoyama N, Schietinger T, Schneider O, Schwanda C, Schwartz AJ, Seidl R, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Singh JB, Sokolov A, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumisawa K, Sumiyoshi T, Suzuki S, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Teramoto Y, Tian XC, Trabelsi K, Tsuboyama T, Tsukamoto T, Uehara S, Uglov T, Ueno K, Unno Y, Uno S, Urquijo P, Usov Y, Varner G, Villa S, Wang CC, Wang CH, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamauchi M, Ying J, Yuan Y, Zhang CC, Zhang J, Zhilich V, Zürcher D. Improved constraints on D0-D0 mixing in D0 --> K+ pi- decays from the Belle detector. PHYSICAL REVIEW LETTERS 2006; 96:151801. [PMID: 16712147 DOI: 10.1103/physrevlett.96.151801] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2006] [Indexed: 05/09/2023]
Abstract
We report the results of a search for D0-D0 mixing in D0 --> K+ pi- decays based on 400 fb(-1) of data accumulated by the Belle detector at KEKB. Both assuming CP conservation and allowing for CP violation, we fit the decay-time distribution for the mixing parameters x and y, as well as for the parameter R(D), the ratio of doubly Cabibbo-suppressed decays to Cabibbo-favored decays. The 95% confidence level region in the (x'2,y') plane is obtained using a frequentist method. Assuming CP conservation, we find x'2 < 0.72 x 10(-3) and -9.9 x 10(-3) < y' < 6.8 x 10(-3) at the 95% confidence level; these are the most stringent constraints on the mixing parameters to date. The no-mixing point (0,0) has a confidence level of 3.9%. Assuming no mixing, we measure R(D) = (0.377 +/- 0.008 +/- 0.005)%.
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121
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Shimada K, Ohashi I, Sakai Y, Kijima T, Yoshida S, Okuno T, Hanafusa K, Shibuya H. An unusual renal vascular anomaly: common origin of arteries to the lower poles demonstrated by a computed tomography angiography using 16-slice multidetector computed tomography. Acta Radiol 2006; 47:332-4. [PMID: 16613317 DOI: 10.1080/02841850500539066] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Arterial connection between the left and right kidneys is extremely rare. Only eight cases of such anomalous conditions have been reported in the world literature and all were confirmed by invasive angiography or dissection. We report a patient with this vascular anomaly clearly demonstrated by 16-slice multidetector computed tomography.
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122
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Kato Y, Asano K, Mizutani I, Konno T, Sasaki Y, Kutara K, Teshima K, Edamura K, Kano R, Suzuki K, Shibuya H, Sato T, Hasegawa A, Tanaka S. Gene expressions of canine angiopoietin-1 and -2 in normal tissues and spontaneous tumours. Res Vet Sci 2006; 81:280-6. [PMID: 16545849 DOI: 10.1016/j.rvsc.2005.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2005] [Revised: 11/10/2005] [Accepted: 12/02/2005] [Indexed: 01/20/2023]
Abstract
The angiopoietin (Ang) family of proteins are central to the regulation of angiogenesis. The purposes of this study were to determine cDNA sequences of canine Ang-1 and Ang-2 and investigate their expressions in normal tissues and spontaneous tumours. The cDNA sequences of canine Ang-1 and Ang-2 were 1,494 and 1,488 bp, and the deduced amino acid sequences were 497 and 495 residues, respectively. The cDNA sequences of canine Ang-1 and Ang-2 showed high homology with those of the other mammalian species. Canine Ang-1 and Ang-2 mRNA were detectable in all 22 normal tissues and spontaneous tumours. Higher mRNA expression level of canine Ang-2 was demonstrated in mammary simple carcinomas, haemangiosarcoma and hepatocellular carcinoma in comparison with normal tissues.
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123
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Uehara S, Abe K, Abe K, Adachi I, Aihara H, Arinstein K, Asano Y, Aulchenko V, Aushev T, Bakich AM, Balagura V, Barberio E, Bedny I, Belous K, Bitenc U, Bizjak I, Blyth S, Bondar A, Bozek A, Bracko M, Browder TE, Chang MC, Chen A, Chen WT, Cheon BG, Chistov R, Choi SK, Choi Y, Choi YK, Chuvikov A, Dalseno J, Danilov M, Dash M, Dragic J, Eidelman S, Epifanov D, Fratina S, Gabyshev N, Garmash A, Gershon T, Gokhroo G, Gorisek A, Ha HC, Hayasaka K, Hayashii H, Hazumi M, Hinz L, Hoshi Y, Hou S, Iijima T, Inami K, Ishikawa A, Itoh R, Iwasaki M, Iwasaki Y, Katayama N, Kawai H, Kawasaki T, Kichimi H, Kim HJ, Kim SM, Korpar S, Krokovny P, Kulasiri R, Kuo CC, Kuzmin A, Kwon YJ, Lange JS, Leder G, Lee SE, Lesiak T, Li J, Lin SW, Liventsev D, Mandl F, Matsumoto T, Matyja A, Mitaroff W, Miyabayashi K, Miyata H, Miyazaki Y, Mizuk R, Nagamine T, Nagasaka Y, Nakano E, Nakao M, Nakazawa H, Nishida S, Nitoh O, Ogawa S, Ohshima T, Okabe T, Okuno S, Olsen SL, Pakhlov P, Park CW, Park H, Pestotnik R, Piilonen LE, Poluektov A, Sakai Y, Sato N, Satoyama N, Schietinger T, Schneider O, Senyo K, Sevior ME, Shapkin M, Shibuya H, Shwartz B, Sidorov V, Singh JB, Sokolov A, Somov A, Soni N, Stamen R, Stanic S, Staric M, Sumiyoshi T, Takasaki F, Tamai K, Tamura N, Tanaka M, Taylor GN, Tian XC, Trabelsi K, Tsukamoto T, Uglov T, Ueno K, Uno S, Urquijo P, Usov Y, Varner G, Watanabe Y, Won E, Xie QL, Yabsley BD, Yamaguchi A, Yamauchi M, Ying J, Zhang CC, Zhang J, Zhang LM, Zhang ZP, Zhilich V. Observation of a chi(c2)' candidate in gamma gamma --> DD production at belle. PHYSICAL REVIEW LETTERS 2006; 96:082003. [PMID: 16606172 DOI: 10.1103/physrevlett.96.082003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2005] [Indexed: 05/08/2023]
Abstract
We report on a search for new resonant states in the process gamma gamma --> DD. A candidate C-even charmonium state is observed in the vicinity of 3.93 GeV/c2. The production rate and the angular distribution in the gamma gamma center-of-mass frame suggest that this state is the previously unobserved chi(c2)', the 2(3)P2 charmonium state.
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124
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Kondo H, Takada M, Shibuya H, Shirai W, Matsuo K, Sato T. Cutaneous Plasmacytoma in Three Golden Hamsters (Mesocrietus auratus). ACTA ACUST UNITED AC 2006; 53:74-6. [PMID: 16466459 DOI: 10.1111/j.1439-0442.2006.00796.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Spontaneously occurring cutaneous tumours in three golden hamsters were characterized using histological, immunohistochemical and ultrastructural methods. Histologically, the tumours were composed of sheets of round to oval plasmacytoid cells with eccentrically placed nuclei. Tissue sections were weakly positive for anti-B lymphocyte antigen (BLA) staining. Ultrastructurally, large amounts of rough endoplasmic reticulum in the cytoplasm were observed. BLA positivity and characteristics of ultrastructure showed the plasma cell origin.
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Matsuura F, Makino K, Fukushima T, Matsubara N, Shibuya M, Higuchi T, Hashidate H, Yamada M, Shibuya H, Yamazaki M. Optic nerve and spinal cord manifestations of malignant atrophic papulosis (Degos disease). J Neurol Neurosurg Psychiatry 2006; 77:260-2. [PMID: 16421135 PMCID: PMC2077559 DOI: 10.1136/jnnp.2005.066134] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
A fatal case of malignant atrophic papulosis (Degos disease) with optic nerve and spinal cord involvement is described. Magnetic resonance imaging (MRI) of the optic nerve showed abnormal signal enhancement on fat suppressed T1 weighted images after intravenous meglumine gadopentetate infusion. On T2 weighted sagittal images, a sawtooth pattern was observed over seven vertebral segments of the spinal cord. On necropsy, a severe loss of myelinated nerve fibres in the left optic nerve was seen, with thrombotic obstruction of the central retinal artery. Spongy degeneration was observed in all levels of the spinal cord, with patchy and motheaten patterns caused by thromboses and endothelial proliferation in subarachnoid vessels. Findings on MRI were consistent with findings on pathological examination.
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