Observation of B+→K+ ηγ

被引：25

作者：

Nishida, S ^{[1
]}

Abe, K

Aihara, H

Akatsu, M

Asano, Y

Aulchenko, V

Aushev, T

Bahinipati, S

Bakich, AM

Ban, Y

Banerjee, S

Bedny, I

Bitenc, U

Bizjak, I

Blyth, S

Bondar, A

Bozek, A

Bracko, M

Brodzicka, J

Browder, TE

Chao, Y

Chen, A

Chen, KF

Chen, WT

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Choi, YK

Chuvikov, A

Cole, S

Dalseno, J

Danilov, M

Dash, M

Dong, LY

Dragic, J

Drutskoy, A

Eidelman, S

Eiges, V

Enari, Y

Epifanov, D

Fang, F

Fratina, S

Gabyshev, N

Hayasaka, K

Hayashii, H

Hazumi, M

Higuchi, T

Hinz, L

Hokuue, 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] Chonnam Natl Univ, Kwangju, South Korea

[5] Univ Cincinnati, Cincinnati, OH 45221 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 100864, 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] Kyungpook Natl Univ, Taegu 702701, South Korea

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

[18] Univ Ljubljana, Ljubljana 61000, Slovenia

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

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

[21] Nagoya Univ, Nagoya, Aichi, Japan

[22] Nara Womens Univ, Nara 630, Japan

[23] Natl Cent Univ, Chungli 32054, Taiwan

[24] Natl United Univ, Miaoli, Taiwan

[25] Natl Taiwan Univ, Dept Phys, Taipei 10764, Taiwan

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

[27] Nihon Dent Coll, Niigata, Japan

[28] Niigata Univ, Niigata 95021, Japan

[29] Osaka City Univ, Osaka 558, Japan

[30] Osaka Univ, Suita, Osaka 565, Japan

[31] Panjab Univ, Chandigarh 160014, India

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

[33] Princeton Univ, Princeton, NJ 08544 USA

[34] Saga Univ, Saga 840, Japan

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

[36] Seoul Natl Univ, Seoul 151, South Korea

[37] Sungkyunkwan Univ, Suwon, South Korea

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

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

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

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

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

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

[44] Tokyo Inst Technol, Tokyo 152, Japan

[45] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

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

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

[49] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICS LETTERS B | 2005年 / 610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：

radiative B decay;

D O I：

10.1016/j.physletb.2005.01.097

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report measurements of radiative B decays with K eta gamma final states, using a data sample of 253 fb(-1) recorded at the gamma(4S) resonance with the Belle detector at the KEKB e(+)e(-) storage ring. We observe B+ -> K(+)eta gamma for the first time with a branching fraction of (8.44 +/- 1.5(stat)(-0.9)(+1.2)(syst)) x 10(-6) for M (K) (eta) < 2.4 GeV/c(2), and find evidence of B-0 -> K(0)eta gamma. We also search for B -> K-3*(1780)gamma. (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：23 / 30

页数：8

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