Evidence for ψ′ Decays into γπ0 and γη

被引：32

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[5
]}

An, L. ^{[9
]}

An, Q. ^{[35
]}

An, Z. H. ^{[1
]}

Bai, J. Z. ^{[1
]}

Baldini, R. ^{[17
]}

Ban, Y. ^{[22
]}

Becker, J. ^{[2
]}

Berger, N. ^{[1
]}

Bertani, M. ^{[17
]}

Bian, J. M. ^{[1
]}

Boyko, I. ^{[15
]}

Briere, R. A. ^{[3
]}

Bytev, V. ^{[15
]}

Cai, X. ^{[1
]}

Cao, G. F. ^{[1
]}

Cao, X. X. ^{[1
]}

Chang, J. F. ^{[1
]}

Chelkov, G. ^{[15
,43
]}

Chen, G. ^{[1
]}

Chen, H. S. ^{[1
]}

Chen, J. C. ^{[1
]}

Chen, M. L. ^{[1
]}

Chen, S. J. ^{[20
]}

Chen, Y. ^{[1
]}

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

Cheng, H. P. ^{[11
]}

Chu, Y. P. ^{[1
]}

Cronin-Hennessy, D. ^{[34
]}

Dai, H. L. ^{[1
]}

Dai, J. P. ^{[1
]}

Dedovich, D. ^{[15
]}

Deng, Z. Y. ^{[1
]}

Denysenko, I. ^{[15
]}

Destefanis, M. ^{[37
,38
]}

Ding, Y. ^{[18
]}

Dong, L. Y. ^{[1
]}

Dong, M. Y. ^{[1
]}

Du, S. X. ^{[42
]}

Duan, M. Y. ^{[25
]}

Fan, R. R. ^{[1
]}

Fang, J. ^{[1
]}

Fang, S. S. ^{[1
]}

Feldbauer, F. ^{[2
]}

Feng, C. Q. ^{[35
]}

Fu, C. D. ^{[1
]}

Fu, J. L. ^{[20
]}

Gao, Y. ^{[31
]}

Geng, C. ^{[35
]}

机构：

[1] Inst High Energy Phys, Beijing 100049, Peoples R China

[2] Ruhr Univ Bochum, D-44780 Bochum, Germany

[3] Carnegie Mellon Univ, Pittsburgh, PA 15213 USA

[4] China Ctr Adv Sci & Technol, Beijing 100190, Peoples R China

[5] GI Budker Inst Nucl Phys SB RAS BINP, Novosibirsk 630090, Russia

[6] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

[7] GSI Helmholtzctr Heavy Ion Res GmbH, D-64291 Darmstadt, Germany

[8] Guangxi Normal Univ, Guilin 541004, Peoples R China

[9] Guangxi Univ, Nanning 530004, Peoples R China

[10] Henan Normal Univ, Xinxiang 453007, Peoples R China

[11] Huangshan Coll, Huangshan 245000, Peoples R China

[12] Huazhong Normal Univ, Wuhan 430079, Peoples R China

[13] Hunan Univ, Changsha 410082, Hunan, Peoples R China

[14] Indiana Univ, Bloomington, IN 47405 USA

[15] Joint Inst Nucl Res, Dubna 141980, Russia

[16] KVI Univ Groningen, NL-9747 AA Groningen, Netherlands

[17] Ist Nazl Fis Nucl, Lab Nazl Frascati, I-00044 Frascati, Italy

[18] Liaoning Univ, Shenyang 110036, Peoples R China

[19] Nanjing Normal Univ, Nanjing 210046, Peoples R China

[20] Nanjing Univ, Nanjing 210093, Peoples R China

[21] Nankai Univ, Tianjin 300071, Peoples R China

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

[23] Seoul Natl Univ, Seoul 151747, South Korea

[24] Shandong Univ, Jinan 250100, Peoples R China

[25] Shanxi Univ, Taiyuan 030006, Peoples R China

[26] Sichuan Univ, Chengdu 610064, Peoples R China

[27] Sun Yat Sen Univ, Guangzhou 510275, Guangdong, Peoples R China

[28] Chinese Univ Hong Kong, Shatin, Hong Kong, Peoples R China

[29] Univ Hong Kong, Pokfulam, Hong Kong, Peoples R China

[30] Univ Tokyo, Tokyo 1130033, Japan

[31] Tsinghua Univ, Beijing 100084, Peoples R China

[32] Univ Giessen, D-35392 Giessen, Germany

[33] Univ Hawaii, Honolulu, HI 96822 USA

[34] Univ Minnesota, Minneapolis, MN 55455 USA

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

[36] Univ Punjab, Lahore 54590, Pakistan

[37] Univ Turin, Turin, Italy

[38] Ist Nazl Fis Nucl, I-10125 Turin, Italy

[39] Univ Washington, Seattle, WA 98195 USA

[40] Wuhan Univ, Wuhan 430072, Peoples R China

[41] Zhejiang Univ, Hangzhou 310027, Peoples R China

[42] Zhengzhou Univ, Zhengzhou 450001, Peoples R China

[43] Moscow Inst Phys & Technol, Moscow, Russia

[44] PNPI, Gatchina, Russia

来源：

PHYSICAL REVIEW LETTERS | 2010年 / 105卷 / 26期

基金：

中国国家自然科学基金; 新加坡国家研究基金会; 俄罗斯基础研究基金会;

关键词：

PSEUDOSCALAR MESONS; EXCLUSIVE PROCESSES; PHOTON; STATES;

D O I：

10.1103/PhysRevLett.105.261801

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The decays psi' -> gamma pi(0), gamma eta and gamma eta' are studied using data collected with the BESIII detector at the BEPCII e(+)e(-) collider. The processes psi' -> gamma pi(0) and psi' -> gamma eta are observed for the first time with signal significances of 4.6 sigma and 4.3 sigma, respectively. The branching fractions are determined to be B(psi' -> gamma pi(0)) = (1.58 +/- 0.40 +/- 0.13) X 10(-6), B(psi' -> gamma eta) = (1.38 +/- 0.48 +/- 0.09 +/- 10(-6)) and B(psi' -> gamma eta') = (126 +/- 3 +/- 8) X 10(-6), where the first errors are statistical and the second ones systematic.

引用

页数：6

共 22 条

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