Observation of a resonancelike structure in the π+-ψ′ mass distribution in exclusive B→Kπ+-ψ′ decays

被引：479

作者：

Choi, S. -K. ^{[1
]}

Olsen, S. L.

Adachi, I. ^{[9
]}

Aihara, H. ^{[40
]}

Aulchenko, V. ^{[2
]}

Aushev, T.

Aziz, T. ^{[37
]}

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

Balagura, V. ^{[13
]}

Bedny, I. ^{[2
]}

Bitenc, U. ^{[14
]}

Bondar, A. ^{[2
]}

Bozek, A. ^{[27
]}

Bracko, M. ^{[14
,20
]}

Brodzicka, J. ^{[9
]}

Browder, T. E. ^{[8
]}

Chang, P. ^{[26
]}

Chao, Y. ^{[26
]}

Chen, A. ^{[24
]}

Chen, K. -F. ^{[26
]}

Chen, W. T. ^{[24
]}

Cheon, B. G. ^{[7
]}

Chistov, R. ^{[13
]}

Choi, Y. ^{[35
]}

Dalseno, J. ^{[21
]}

Danilov, M. ^{[13
]}

Dash, M. ^{[44
]}

Eidelman, S. ^{[2
]}

Gabyshev, N. ^{[2
]}

Golob, B. ^{[14
,19
]}

Haba, J. ^{[9
]}

Hara, T. ^{[30
]}

Hayasaka, K. ^{[22
]}

Hayashii, H. ^{[23
]}

Hazumi, M. ^{[9
]}

Heffernan, D. ^{[30
]}

Hoshi, Y. ^{[39
]}

Hou, W. -S. ^{[26
]}

Hyun, H. J. ^{[17
]}

Iijima, T. ^{[22
]}

Inami, K. ^{[22
]}

Ishikawa, A. ^{[32
]}

Ishino, H. ^{[41
]}

Itoh, R. ^{[9
]}

Iwasaki, M. ^{[40
]}

Iwasaki, Y. ^{[9
]}

Kah, D. H. ^{[17
]}

Kang, J. H. ^{[45
]}

Katayama, N. ^{[9
]}

Kawai, H. ^{[3
]}

机构：

[1] Gyeongsang Natl Univ, Chinju, South Korea

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

[3] Chiba Univ, Chiba, Japan

[4] Univ Cincinnati, Cincinnati, OH 45221 USA

[5] Univ Giessen, Giessen, Germany

[6] Grad Univ Adv Studies, Hayama, Japan

[7] Hanyang Univ, Seoul 133791, South Korea

[8] Univ Hawaii, Honolulu, HI 96822 USA

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

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

[11] Inst High Energy Phys, Vienna, Austria

[12] Inst High Energy Phys, Protvino, Russia

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

[14] Jozef Stefan Inst, Ljubljana, Slovenia

[15] Kanagawa Univ, Yokohama, Kanagawa, Japan

[16] Korea Univ, Seoul 136701, South Korea

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

[18] Ecole Polytech Fed Lausanne, Lausanne, Switzerland

[19] Univ Ljubljana, Ljubljana, Slovenia

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

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

[22] Nagoya Univ, Nagoya, Aichi, Japan

[23] Nara Womens Univ, Nara 630, Japan

[24] Natl Cent Univ, Chungli 32054, Taiwan

[25] Natl United Univ, Miaoli, Taiwan

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

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

[28] Niigata Univ, Niigata, Japan

[29] Osaka City Univ, Osaka 558, Japan

[30] Osaka Univ, Osaka, 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] Tata Inst Fundamental Res, Bombay 400005, Maharashtra, India

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

[39] Tohoku Gakuin Univ, Tagajo, Miyagi, 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] Virginia Polytech Inst & State Univ, Blacksburg, VA 24061 USA

[45] Yonsei Univ, Seoul 120749, South Korea

[46] Nippon Dent Univ, Niigata, Japan

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 14期

关键词：

D O I：

10.1103/PhysRevLett.100.142001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A distinct peak is observed in the pi(+/-)psi' invariant mass distribution near 4.43 GeV in B -> K pi(+/-)psi' decays. A fit using a Breit-Wigner resonance shape yields a peak mass and width of M=4433 +/- 4(stat)+/- 2(syst) MeV and Gamma=45(-13)(+18)(stat)(-13)(+30)(syst) MeV. The product branching fraction is determined to be B(B(0)-> K(-/+)Z(+/-)(4430))xB(Z(+/-)(4430)->pi(+/-)psi')=(4.1 +/- 1.0(stat)+/- 1.4(syst))x10(-5), where Z(+/-)(4430) is used to denote the observed structure. The statistical significance of the observed peak is 6.5 sigma. These results are obtained from a 605 fb(-1) data sample that contains 657x10(6) B (B) over bar pairs collected near the Upsilon(4S) resonance with the Belle detector at the KEKB asymmetric energy e(+)e(-) collider.

引用

页数：6

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