Observation of B+→p(p)over-barπ+, B0→p(p)over-barK0, and B+→p(p)over-barK*+ -: art. no. 131801

被引：72

作者：

Wang, MZ ^{[1
]}

Abe, K

Abe, T

Adachi, I

Aihara, H

Asano, Y

Aso, T

Aulchenko, V

Aushev, T

Bakich, AM

Bay, A

Bizjak, I

Bondar, A

Bozek, A

Bracko, M

Browder, TE

Chang, MC

Chang, P

Chao, Y

Chen, KF

Cheon, BG

Chistov, R

Choi, SK

Choi, Y

Choi, YK

Chu, PH

Chuvikov, A

Danilov, M

Dong, LY

Drutskoy, A

Eidelman, S

Eiges, V

Fukunaga, C

Gabyshev, N

Garmash, A

Gershon, T

Gokhroo, G

Golob, B

Hara, T

Hayashii, H

Hazumi, M

Hokuue, T

Hoshi, Y

Hou, WS

Huang, HC

Inami, K

Ishikawa, A

Itoh, R

Iwasaki, H

机构：

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

[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] Gyeongsang Natl Univ, Chinju, South Korea

[7] Univ Hawaii, Honolulu, HI 96822 USA

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

[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] Kyungpook Natl Univ, Taegu 702701, South Korea

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

[18] Univ Ljubljana, Ljubljana, 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 Lien Ho Inst Technol, Miaoli, Taiwan

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

[25] Nihon Dent Coll, Niigata, Japan

[26] Niigata Univ, Niigata, Japan

[27] Osaka City Univ, Osaka 558, Japan

[28] Osaka Univ, Fac Engn, Osaka, Japan

[29] Panjab Univ, Chandigarh 160014, India

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

[31] Princeton Univ, Princeton, NJ 08545 USA

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

[33] Saga Univ, Saga 840, Japan

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

[35] Seoul Natl Univ, Seoul, South Korea

[36] Sungkyunkwan Univ, Suwon, South Korea

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

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

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

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

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

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

[43] Tokyo Metropolitan Univ, Tokyo 158, Japan

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

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

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

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

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

[49] Yokkaichi Univ, Yokaichi, Japan

[50] Yonsei Univ, Seoul 120749, South Korea

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 13期

基金：

日本学术振兴会; 中国国家自然科学基金; 澳大利亚研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.92.131801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report the first observation of a b-->u type charmless baryonic B decay, B+-->p (p) over bar pi(+), as well as b-->s type B-0-->p (p) over barK(0) and B+-->p (p) over barK(*+) decays. The analysis is based on a 78 fb(-1) data sample recorded on the Y(4S) resonance with the Belle detector at KEKB. We find B(B+-->p (p) over bar pi(+))=(3.06(-0.62)(+0.73)+/-0.37)x10(-6), B(B-0-->p (p) over barK(0))=(1.88(-0.60)(+0.77)+/-0.23)x10(-6), and B(B+-->p (p) over barK(*+))=(10.3(-2.8-1.7)(+3.6+1.3))x10(-6). We also update B(B+-->p (p) over barK(+))=(5.66(-0.57)(+0.67)+/-0.62)x10(-6) and present an upper limit on B(B-0-->p (p) over barK(*0)) at the 90% confidence level. A common feature of the observed decay modes is threshold peaking in baryon pair invariant mass.

引用

页码：131801 / 1

页数：6

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