Observation of B- → (p)over-barΛD0 at Belle

被引：11

作者：

Chen, P. ^{[1
]}

Wang, M. -Z. ^{[1
]}

Adachi, I. ^{[11
]}

Aihara, H. ^{[52
]}

Asner, D. M. ^{[40
]}

Aulchenko, V. ^{[2
,3
]}

Aushev, T. ^{[18
]}

Bakich, A. M. ^{[46
]}

Barberio, E. ^{[30
]}

Belous, K. ^{[17
]}

Bhuyan, B. ^{[13
]}

Bozek, A. ^{[35
]}

Bracko, M. ^{[19
,28
]}

Browder, T. E. ^{[10
]}

Chang, M. -C. ^{[6
]}

Chang, P. ^{[1
]}

Chao, Y. ^{[1
]}

Chen, A. ^{[33
]}

Cheon, B. G. ^{[9
]}

Cho, I. -S. ^{[57
]}

Cho, K. ^{[22
]}

Choi, Y. ^{[45
]}

Dalseno, J. ^{[29
,48
]}

Danilov, M. ^{[18
]}

Dolezal, Z. ^{[4
]}

Drasal, Z. ^{[4
]}

Eidelman, S. ^{[2
,3
]}

Fast, J. E. ^{[40
]}

Feindt, M. ^{[21
]}

Gaur, V. ^{[47
]}

Goh, Y. M. ^{[9
]}

Haba, J. ^{[11
]}

Hara, T. ^{[11
]}

Hayasaka, K. ^{[31
]}

Hayashii, H. ^{[32
]}

Hoshi, Y. ^{[50
]}

Hou, W. -S. ^{[1
]}

Hsiung, Y. B. ^{[1
]}

Hyun, H. J. ^{[24
]}

Ishikawa, A. ^{[51
]}

Itoh, R. ^{[11
]}

Iwabuchi, M. ^{[57
]}

Iwasaki, Y. ^{[11
]}

Iwashita, T. ^{[32
]}

Julius, T. ^{[30
]}

Kang, J. H. ^{[57
]}

Kapusta, P. ^{[35
]}

Katayama, N. ^{[11
]}

Kawasaki, T. ^{[37
]}

Kichimi, H. ^{[11
]}

机构：

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

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

[3] Novosibirsk State Univ, Novosibirsk 630090, Russia

[4] Charles Univ Prague, Fac Math & Phys, Prague, Czech Republic

[5] Univ Cincinnati, Cincinnati, OH 45221 USA

[6] Fu Jen Catholic Univ, Dept Phys, Taipei, Taiwan

[7] Univ Giessen, Giessen, Germany

[8] Gifu Univ, Gifu, Japan

[9] Hanyang Univ, Seoul 133791, South Korea

[10] Univ Hawaii, Honolulu, HI 96822 USA

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

[12] Hiroshima Inst Technol, Hiroshima, Japan

[13] Indian Inst Technol Guwahati, Gauhati, India

[14] Indian Inst Technol, Madras 600036, Tamil Nadu, India

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

[16] Inst High Energy Phys, Vienna, Austria

[17] Inst High Energy Phys, Protvino, Russia

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

[19] J Stefan Inst, Ljubljana, Slovenia

[20] Kanagawa Univ, Yokohama, Kanagawa, Japan

[21] Karlsruher Inst Technol, Inst Expt Kernphys, Karlsruhe, Germany

[22] Korea Inst Sci & Technol Informat, Taejon, South Korea

[23] Korea Univ, Seoul, South Korea

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

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

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

[27] Luther Coll, Decorah, IA 52101 USA

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

[29] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

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

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

[32] Nara Womens Univ, Nara 630, Japan

[33] Natl Cent Univ, Chungli 32054, Taiwan

[34] Natl United Univ, Miaoli, Taiwan

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

[36] Nippon Dent Univ, Niigata, Japan

[37] Niigata Univ, Niigata, Japan

[38] Univ Nova Gorica, Nova Gorica, Slovenia

[39] Osaka City Univ, Osaka 558, Japan

[40] Pacific NW Natl Lab, Richland, WA 99352 USA

[41] Panjab Univ, Chandigarh 160014, India

[42] Nucl Phys Res Ctr, Osaka, Japan

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

[44] Seoul Natl Univ, Seoul, South Korea

[45] Sungkyunkwan Univ, Suwon, South Korea

[46] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

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

[48] Tech Univ Munich, D-8046 Garching, Germany

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

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

来源：

PHYSICAL REVIEW D | 2011年 / 84卷 / 07期

基金：

日本学术振兴会; 新加坡国家研究基金会; 澳大利亚研究理事会; 中国国家自然科学基金; 瑞士国家科学基金会;

关键词：

D O I：

10.1103/PhysRevD.84.071501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study B- meson decays to (p) over bar Lambda D-(*)0 final states using a sample of 657 x 10(6) B (B) over bar events collected at the Gamma(4S) resonance with the Belle detector at the KEKB asymmetric-energy e(+)e(-) collider. The observed branching fraction for B- -> (p) over bar Lambda D-0 is (1.43(-0.25)(+0.28) +/-0.18) x 10(-5) with a significance of 8.1 standard deviations, where the uncertainties are statistical and systematic, respectively. Most of the signal events have the (p) over bar Lambda mass peaking near threshold. No significant signal is observed for B- -> (p) over bar Lambda D-0 and the corresponding upper limit on the branching fraction is 4.8 x 10(-5) at the 90% confidence level.

引用

页数：7

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