Measurements of branching fractions and decay amplitudes in B→J/ψ K* decays

被引：53

作者：

Abe, K ^{[1
]}

Abe, T

Adachi, I

Ahn, BS

Aihara, H

Akatsu, M

Asano, Y

Aso, T

Aulchenko, V

Aushev, T

Bakich, AM

Ban, Y

Banas, E

Bay, A

Behera, PK

Bondar, A

Bozek, A

Browder, TE

Casey, BCK

Chao, Y

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Danilov, M

Dong, LY

Eidelman, S

Eiges, V

Enari, Y

Fang, F

Fukunaga, C

Gershon, T

Gotow, K

Guo, R

Haba, J

Hanagaki, K

Hara, T

Hayashii, H

Hazumi, M

Heenan, EM

Higuchi, I

Higuchi, T

Hokuue, T

Hoshi, Y

Hou, SR

Hou, WS

Huang, HC

Igaki, T

Iijima, T

机构：

[1] KEK, High Energy Accelerator Res Org, Tsukuba, Ibaraki, Japan

[2] Budker Inst Nucl Phys, Novosibirsk 630090, Russia

[3] Chiba Univ, Chiba, Japan

[4] Chuo Univ, Tokyo 112, Japan

[5] Univ Cincinnati, Cincinnati, OH USA

[6] Goethe Univ Frankfurt, D-6000 Frankfurt, Germany

[7] Gyeongsang Natl Univ, Chinju, South Korea

[8] Univ Hawaii, Honolulu, HI 96822 USA

[9] Hiroshima Inst Technol, Hiroshima, Japan

[10] Chinese Acad Sci, Inst High Energy Phys, Beijing, Peoples R China

[11] Inst High Energy Phys, Vienna, Austria

[12] Inst Theoret & Expt Phys, Moscow 117259, Russia

[13] Jozef Stefan Inst, Ljubljana, Slovenia

[14] Kanagawa Univ, Yokohama, Kanagawa, Japan

[15] Korea Univ, Seoul 136701, South Korea

[16] Kyoto Univ, Kyoto, Japan

[17] Kyungpook Natl Univ, Taegu 702701, South Korea

[18] Univ Lausanne, Inst Phys Hautes Energies, Lausanne, Switzerland

[19] Univ Ljubljana, Ljubljana, Slovenia

[20] Univ Maribor, SLO-2000 Maribor, Slovenia

[21] Univ Melbourne, Parkville, Vic 3052, Australia

[22] Nagoya Univ, Nagoya, Aichi, Japan

[23] Nara Womens Univ, Nara 630, Japan

[24] Natl Kaohsiung Normal Univ, Kaohsiung, Taiwan

[25] Natl Lien Ho Inst Technol, Miaoli, Taiwan

[26] Natl Taiwan Univ, Taipei 10764, Taiwan

[27] H Niewodniczanski Inst Nucl Phys, PL-31342 Krakow, Poland

[28] Nihon Dent Coll, Niigata, Japan

[29] Niigata Univ, Niigata, Japan

[30] Osaka City Univ, Osaka 558, Japan

[31] Osaka Univ, Osaka, Japan

[32] Panjab Univ, Chandigarh 160014, India

[33] Peking Univ, Beijing 100871, Peoples R China

[34] Princeton Univ, Princeton, NJ 08544 USA

[35] RIKEN, BNL Res Ctr, Brookhaven, NY USA

[36] Univ Sci & Technol China, Hefei, Peoples R China

[37] Seoul Natl Univ, Seoul, South Korea

[38] Sungkyunkwan Univ, Suwon, South Korea

[39] Univ Sydney, Sydney, NSW 2006, Australia

[40] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

[41] Toho Univ, Funabashi, Chiba 274, Japan

[42] Tohoku Gakuin Univ, Tagajo, Miyagi, Japan

[43] Tohoku Univ, Sendai, Miyagi 980, Japan

[44] Univ Tokyo, Tokyo, Japan

[45] Tokyo Inst Technol, Tokyo 152, Japan

[46] Tokyo Metropolitan Univ, Tokyo 158, Japan

[47] Tokyo Univ Agr & Technol, Tokyo, Japan

[48] Toyama Natl Coll Maritime Technol, Toyama, Japan

[49] Univ Tsukuba, Tsukuba, Ibaraki 305, Japan

[50] Utkal Univ, Bhubaneswar 751004, Orissa, India

来源：

PHYSICS LETTERS B | 2002年 / 538卷 / 1-2期

基金：

澳大利亚研究理事会; 日本学术振兴会; 中国国家自然科学基金;

关键词：

D O I：

10.1016/S0370-2693(02)01969-X

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The branching fractions and the decay amplitudes of B --> J/psiK* decays are measured in a 29.4 fb(-1) data sample collected with the Belle detector at the KEKB electron-positron collider. The decay amplitudes of helicity states of the J/psiK* system are determined from the full angular distribution of the final state particles in the transversity basis. The branching fractions are measured to be (1.29 +/- 0.05 +/- 0.13) x 10(-3) for neutral mesons and (1.28 +/- 0.07 +/- 0.14) x 10(-3) for charged mesons. The measured longitudinal and transverse (perpendicular to the transversity plane) amplitudes are \A(0)\(2) = 0.62 +/- 0.02 +/- 0.03 and \A(perpendicular to)\(2) = 0.19 +/- 0.02 +/- 0.03, respectively. The value of \A(perpendicular to)\(2) shows that the CP even component dominates in the B-0 --> J/psiK*(0)(K(S)pi(0)) decay. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：11 / 20

页数：10

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