Precision measurement of the branching fractions of J/ψ → π+π-π0 and ψ′ → π+π-π0

被引：17

作者：

Ablikim, M. ^{[1
]}

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

Albertoa, D. ^{[41
,42
]}

Ambrose, D. J. ^{[38
]}

An, F. F. ^{[1
]}

An, Q. ^{[39
]}

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

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

Ferroli, R. B. F. Baldini ^{[17
]}

Ban, Y. ^{[25
]}

Becker, J. ^{[2
]}

Berger, N. ^{[1
]}

Bertani, M. B. ^{[17
]}

Bian, J. M. ^{[37
]}

Boger, E. ^{[18
,46
]}

Bondarenko, O. ^{[19
]}

Boyko, I. ^{[18
]}

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

Bytev, V. ^{[18
]}

Cai, X. ^{[1
]}

Calcaterra, A. C. ^{[17
]}

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

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

Chelkov, G. ^{[18
,46
]}

Chen, G. ^{[1
]}

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

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

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

Chen, S. J. ^{[23
]}

Chen, Y. ^{[1
]}

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

Cheng, H. P. ^{[13
]}

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

Cronin-Hennessy, D. ^{[37
]}

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

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

Dedovich, D. ^{[18
]}

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

Denysenko, I. ^{[18
]}

Destefanis, M. ^{[41
,42
]}

Ding, W. M. ^{[27
]}

Ding, Y. ^{[21
]}

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

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

Du, S. X. ^{[45
]}

Fang, J. ^{[1
]}

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

Feng, C. Q. ^{[39
]}

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

Fu, J. L. ^{[23
]}

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 Helmholtz Ctr 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] Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China

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

[12] Henan Univ Sci & Technol, Luoyang, Peoples R China

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

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

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

[16] Indiana Univ, Bloomington, IN 47405 USA

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

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

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

[20] Lanzhou Univ, Lanzhou 730000, Peoples R China

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

[22] Nanjing Normal Univ, Nanjing 210046, Jiangsu, Peoples R China

[23] Nanjing Univ, Nanjing 210093, Jiangsu, Peoples R China

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

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

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

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

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

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

[30] Soochow Univ, Suzhou 215006, Peoples R China

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

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

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

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

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

[36] Univ Hawaii, Honolulu, HI 96822 USA

[37] Univ Minnesota, Minneapolis, MN 55455 USA

[38] Univ Rochester, Rochester, NY 14627 USA

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

[40] Univ Punjab, Lahore 54590, Pakistan

[41] Univ Turin, Turin, Italy

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

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

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

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

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

[47] PNPI, Gatchina, Russia

来源：

PHYSICS LETTERS B | 2012年 / 710卷 / 4-5期

基金：

新加坡国家研究基金会; 中国国家自然科学基金; 美国国家科学基金会; 瑞士国家科学基金会;

关键词：

BES III; Hadronic charmonium decays; RHO-PI PUZZLE; FINAL-STATES; DECAYS;

D O I：

10.1016/j.physletb.2012.03.036

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study the decays of the J/psi and psi' mesons to pi(+)pi(-)pi(0) using data samples at both resonances collected with the BES III detector in 2009. We measure the corresponding branching fractions with unprecedented precision and provide mass spectra and Dalitz plots. The branching fraction for J/psi -> pi(+)pi(-)pi(0) is determined to be (2.137 +/- 0.004 (stat.)(-0.056)(+0.058) (syst.)(-0.026)(+0.027) (norm.)) x 10(-2), and the branching fraction for psi' -> pi(+)pi(-)pi(0) is measured as (2.14 +/- 0.03 (stat.)(-0.07)(+0.08) (syst.)(-0.08)(+0.09) (norm)) x 10(-4). The J/psi decay is found to be dominated by an intermediate rho(770) state, whereas the psi' decay is dominated by di-pion masses around 2.2 GeV/c(2), leading to strikingly different Dalitz distributions. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：594 / 599

页数：6

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