Measurement of Inclusive Radiative B-Meson Decays with a Photon Energy Threshold of 1.7 GeV

被引：85

作者：

Limosani, A. ^{[20
]}

Aihara, H. ^{[40
]}

Arinstein, K. ^{[1
,29
]}

Aushev, T. ^{[11
,17
]}

Bakich, A. M. ^{[36
]}

Balagura, V. ^{[11
]}

Barberio, E. ^{[20
]}

Bay, A. ^{[17
]}

Belous, K. ^{[10
]}

Bischofberger, M. ^{[22
]}

Bondar, A. ^{[1
,29
]}

Bozek, A. ^{[26
]}

Bracko, M. ^{[12
,19
]}

Browder, T. E. ^{[6
]}

Chang, P. ^{[25
]}

Chao, Y. ^{[25
]}

Chen, A. ^{[23
]}

Cheon, B. G. ^{[5
]}

Choi, Y. ^{[35
]}

Dalseno, J. ^{[7
]}

Danilov, M. ^{[11
]}

Drutskoy, A. ^{[2
]}

Dungel, W. ^{[9
]}

Eidelman, S. ^{[1
,29
]}

Goldenzweig, P. ^{[2
]}

Golob, B. ^{[12
,18
]}

Ha, H. ^{[15
]}

Hayashii, H. ^{[22
]}

Hoshi, Y. ^{[38
]}

Hou, W. -S. ^{[25
]}

Hyun, H. J. ^{[16
]}

Inami, K. ^{[21
]}

Itoh, R. ^{[7
]}

Iwasaki, Y. ^{[7
]}

Julius, T. ^{[20
]}

Kah, D. H. ^{[16
]}

Kim, H. O. ^{[16
]}

Kim, S. K. ^{[34
]}

Kim, Y. I. ^{[4
]}

Kim, Y. J. ^{[2
]}

Kinoshita, K. ^{[15
]}

Ko, B. R. ^{[12
,19
]}

Korpar, S. ^{[14
]}

Kreps, M. ^{[14
]}

Krizan, P. ^{[12
,18
]}

Krokovny, P. ^{[7
]}

Kuhr, T. ^{[14
]}

Kumar, R. ^{[31
]}

Kwon, Y. -J. ^{[44
]}

Kyeong, S. -H. ^{[44
]}

机构：

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

[2] Univ Cincinnati, Cincinnati, OH 45221 USA

[3] T Kosciuszko Cracow Univ Technol, Krakow, Poland

[4] Grad Univ Adv Studies, Hayama, Kanagawa, Japan

[5] Hanyang Univ, Seoul 133791, South Korea

[6] Univ Hawaii, Honolulu, HI 96822 USA

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

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

[9] Inst High Energy Phys, Vienna, Austria

[10] Inst High Energy Phys, Protvino, Russia

[11] Inst Theoret & Expt Phys, Moscow, Russia

[12] J Stefan Inst, Ljubljana, Slovenia

[13] Kanagawa Univ, Yokohama, Kanagawa, Japan

[14] Univ Karlsruhe, Inst Expt Kernphys, D-7500 Karlsruhe, Germany

[15] Korea Univ, Seoul, South Korea

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

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

[18] Univ Ljubljana, Fac Math & Phys, Ljubljana, Slovenia

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

[20] Univ Melbourne, Sch Phys, Melbourne, Vic 3010, Australia

[21] Nagoya Univ, Nagoya, Aichi 4648601, Japan

[22] Nara Womens Univ, Nara 630, Japan

[23] Natl Cent Univ, Chungli, Taiwan

[24] Natl United Univ, Miaoli, Taiwan

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

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

[27] Nippon Dent Univ, Niigata, Japan

[28] Niigata Univ, Niigata, Japan

[29] Novosibirsk State Univ, Novosibirsk 630090, Russia

[30] Osaka City Univ, Osaka 558, Japan

[31] Panjab Univ, Chandigarh 160014, India

[32] Saga Univ, Saga 840, Japan

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

[34] Seoul Natl Univ, Seoul, South Korea

[35] Sungkyunkwan Univ, Suwon, South Korea

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

[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 Metropolitan Univ, Tokyo 158, Japan

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

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

[44] Yonsei Univ, Seoul 120749, South Korea

[45] Univ Nova Gor, Nova Gorica, Slovenia

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 24期

关键词：

SPECTRUM; MOMENTS;

D O I：

10.1103/PhysRevLett.103.241801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using 605 fb(-1) of data collected at the Upsilon(4S) resonance we present a measurement of the inclusive radiative B-meson decay channel, B -> X-s gamma. For the lower photon energy thresholds of 1.7, 1.8, 1.9, and 2.0 GeV, as defined in the rest frame of the B meson, we measure the partial branching fraction and the mean and variance of the photon energy spectrum. At the 1.7 GeV threshold we obtain the partial branching fraction BF(B -> X-s gamma)=(3.45 +/- 0.15 +/- 0.40)x10(-4), where the errors are statistical and systematic.

引用

页数：6

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