Measurement of the matrix elements for the decays η → π+π-π0 and η/η′ → π0π0π0

被引：43

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[9
,66
]}

Ai, X. C. ^{[1
]}

Albayrak, O. ^{[5
]}

Albrecht, M. ^{[4
]}

Ambrose, D. J. ^{[49
]}

Amoroso, A. ^{[53
,55
]}

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

An, Q. ^{[50
,60
,61
]}

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

Ferroli, R. Baldini ^{[20
]}

Ban, Y. ^{[34
]}

Bennett, D. W. ^{[19
]}

Bennett, J. V. ^{[5
]}

Bertani, M. ^{[20
]}

Bettoni, D. ^{[23
]}

Bian, J. M. ^{[48
]}

Bianchi, F. ^{[53
,55
]}

Boger, E. ^{[26
,64
]}

Boyko, I. ^{[26
]}

Briere, R. A. ^{[5
]}

Cai, H. ^{[57
]}

Cai, X. ^{[1
,60
,61
]}

Cakir, O. ^{[43
,62
]}

Calcaterra, A. ^{[20
]}

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

Cetin, S. A. ^{[44
]}

Chang, J. F. ^{[1
,60
,61
]}

Chelkov, G. ^{[26
,64
,65
]}

Chen, G. ^{[1
]}

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

Chen, H. Y. ^{[2
]}

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

Chen, M. L. ^{[1
,60
,61
]}

Chen, S. J. ^{[32
]}

Chen, X. ^{[1
,60
,61
]}

Chen, X. R. ^{[29
]}

Chen, Y. B. ^{[1
,60
,61
]}

Cheng, H. P. ^{[17
]}

Chu, X. K. ^{[34
]}

Cibinetto, G. ^{[23
]}

Dai, H. L. ^{[1
,60
,61
]}

Dai, J. P. ^{[37
]}

Dbeyssi, A. ^{[14
]}

Dedovich, D. ^{[26
]}

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

Denig, A. ^{[25
]}

Denysenko, I. ^{[26
]}

Destefanis, M. ^{[53
,55
]}

De Mori, F. ^{[53
,55
]}

机构：

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

[2] Beihang Univ, Beijing 100191, Peoples R China

[3] Beijing Inst Petrochem Technol, Beijing 102617, Peoples R China

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

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

[6] Cent China Normal Univ, Wuhan 430079, Peoples R China

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

[8] COMSATS Inst Informat Technol, Lahore 54000, Pakistan

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

[10] GSI Helmholtzcentre Heavy Ion Res GmbH, D-64291 Darmstadt, Germany

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

[12] GuangXi Univ, Nanning 530004, Peoples R China

[13] Hangzhou Normal Univ, Hangzhou 310036, Zhejiang, Peoples R China

[14] Helmholtz Inst Mainz, D-55099 Mainz, Germany

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

[16] Henan Univ Sci & Technol, Luoyang 471003, Peoples R China

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

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

[19] Indiana Univ, Bloomington, IN 47405 USA

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

[21] Ist Nazl Fis Nucl, I-06100 Perugia, Italy

[22] Univ Perugia, I-06100 Perugia, Italy

[23] Ist Nazl Fis Nucl, Sez Ferrara, I-44122 Ferrara, Italy

[24] Univ Ferrara, I-44122 Ferrara, Italy

[25] Johannes Gutenberg Univ Mainz, D-55099 Mainz, Germany

[26] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia

[27] Univ Giessen, Inst Phys 2, D-35392 Giessen, Germany

[28] Univ Groningen, KVI CART, NL-9747 AA Groningen, Netherlands

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

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

[31] Nanjing Normal Univ, Nanjing 210023, Jiangsu, Peoples R China

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

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

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

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

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

[37] Shanghai Jiao Tong Univ, Shanghai 200240, Peoples R China

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

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

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

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

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

[43] Istanbul Aydin Univ, TR-34295 Istanbul, Turkey

[44] Dogus Univ, TR-34722 Istanbul, Turkey

[45] Uludag Univ, TR-16059 Bursa, Turkey

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

[47] Univ Hawaii, Honolulu, HI 96822 USA

[48] Univ Minnesota, Minneapolis, MN 55455 USA

[49] Univ Rochester, Rochester, NY 14627 USA

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

来源：

PHYSICAL REVIEW D | 2015年 / 92卷 / 01期

基金：

美国国家科学基金会; 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：

ELECTROMAGNETIC CORRECTIONS; PARAMETER ALPHA; NEUTRAL DECAYS; PI; 3-PI(0); DYNAMICS;

D O I：

10.1103/PhysRevD.92.012014

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Based on a sample of 1.31 x 10(9) J/psi events collected with the BESIII detector at the BEPCII collider, Dalitz plot analyses of selected 79,625 eta -> pi(+)pi(-)pi(0) events, 33,908 eta -> pi(0)pi(0)pi(0) events, and 1,888 eta' -> pi(0)pi(0)pi(0) events are performed. The measured matrix elements of eta -> pi(+)pi(-)pi(0) are in reasonable agreement with previous measurements. The Dalitz plot slope parameters of eta -> pi(0)pi(0)pi(0) and eta' -> pi(0)pi(0)pi(0) are determined to be -0.055 +/- 0.014 +/- 0.004 and -0.640 +/- 0.046 +/- 0.047, respectively, where the first uncertainties are statistical and the second systematic. Both values are consistent with previous measurements, while the precision of the latter one is improved by a factor of 3. Final state interactions are found to have an important role in those decays.

引用

页数：11

共 37 条

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