Inclusive measurement of the photon energy spectrum in b→sγ decays -: art. no. 061803

被引：203

作者：

Koppenburg, P ^{[1
]}

Abe, K

Abe, T

Adachi, I

Aihara, H

Akatsu, M

Asano, Y

Aulchenko, V

Aushev, T

Bakich, AM

Ban, Y

Bay, A

Bitenc, U

Bizjak, I

Bondar, A

Bozek, A

Bracko, M

Browder, TE

Chang, P

Chao, Y

Chen, KF

Cheon, BG

Choi, Y

Chuvikov, A

Cole, S

Danilov, M

Dash, M

Dong, LY

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Fang, F

Fratina, S

Gabyshev, N

Garmash, A

Gershon, T

Gokhroo, G

Golob, B

Haba, J

Hayashii, H

Hazumi, M

Higuchi, T

Hinz, L

Hokuue, T

Hoshi, Y

Hou, WS

Hsiung, YB

Iijima, T

机构：

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

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

[3] Chiba Univ, Chiba, Japan

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

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

[6] Univ Hawaii, Honolulu, HI 96822 USA

[7] Hiroshima Inst Technol, Hiroshima, Japan

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

[9] Inst High Energy Phys, Vienna, Austria

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

[11] Jozef Stefan Inst, Ljubljana, Slovenia

[12] Kanagawa Univ, Yokohama, Kanagawa, Japan

[13] Korea Univ, Seoul 136701, South Korea

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

[15] Ecole Polytech Fed Lausanne, Swiss Fed Inst Technol Lausanne, CH-1015 Lausanne, Switzerland

[16] Univ Ljubljana, Ljubljana, Slovenia

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

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

[19] Nagoya Univ, Nagoya, Aichi, Japan

[20] Nara Womens Univ, Nara 630, Japan

[21] Natl United Univ, Miaoli, Taiwan

[22] Natl Taiwan Univ, Dept Phys, Taipei, Taiwan

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

[24] Nihon Dent Coll, Niigata, Japan

[25] Niigata Univ, Niigata, Japan

[26] Osaka City Univ, Osaka 558, Japan

[27] Osaka Univ, Osaka, Japan

[28] Panjab Univ, Chandigarh 160014, India

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

[30] Princeton Univ, Princeton, NJ 08545 USA

[31] RIKEN BNL Res Ctr, Upton, NY 11973 USA

[32] Univ Sci & Technol China, Hefei 230026, Peoples R China

[33] Seoul Natl Univ, Seoul, South Korea

[34] Sungkyunkwan Univ, Suwon, South Korea

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

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

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

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

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

[40] Univ Tokyo, Dept Phys, Tokyo 113, Japan

[41] Tokyo Inst Technol, Tokyo 152, Japan

[42] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

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

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

[46] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[47] Yokkaichi Univ, Yokaichi, Japan

[48] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 06期

基金：

中国国家自然科学基金; 日本学术振兴会;

关键词：

D O I：

10.1103/PhysRevLett.93.061803

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report a fully inclusive measurement of the flavor changing neutral current decay b-->sgamma in the energy range 1.8 GeVless than or equal toE(gamma)(*)less than or equal to2.8 GeV, covering 95% of the total spectrum. Using 140 fb(-1), we obtain B(b-->sgamma)=(3.55+/-0.32(-0.31-0.07)(+0.30+0.11))x10(-4), where the errors are statistical, systematic, and from theory corrections. We also measure the first and second moments of the photon energy spectrum above 1.8 GeV and obtain <E-gamma>=2.292+/-0.026+/-0.034 GeV and <E-gamma(2)>-<E-gamma>(2)=0.0305+/-0.0074+/-0.0063 GeV2, where the errors are statistical and systematic.

引用

页码：061803 / 1

页数：6

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