Observation of χc2 → η′η′ and χc0,2 → ηη′

被引：0

作者：

Ablikim, M. ^{[1
]}

Achasov, M. N. ^{[9
,70
]}

Ahmed, S. ^{[14
]}

Albrecht, M. ^{[4
]}

Amoroso, A. ^{[60
,62
]}

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

An, Q. ^{[43
,44
,57
]}

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

Bai, Y. ^{[42
]}

Bakina, O. ^{[27
]}

Ferroli, R. Baldini ^{[20
]}

Ban, Y. ^{[35
]}

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

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

Berger, N. ^{[26
]}

Bertani, M. ^{[20
]}

Bettoni, D. ^{[23
]}

Bian, J. M. ^{[54
]}

Bianchi, F. ^{[60
,62
]}

Boger, E. ^{[27
,68
]}

Boyko, I. ^{[27
]}

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

Cai, H. ^{[64
]}

Cai, X. ^{[1
,43
,44
]}

Cakir, O. ^{[47
]}

Calcaterra, A. ^{[20
]}

Cao, G. F. ^{[1
,51
]}

Cetin, S. A. ^{[48
]}

Chai, J. ^{[62
]}

Chang, J. F. ^{[1
,43
,44
]}

Chelkov, G. ^{[27
,68
,69
]}

Chen, G. ^{[1
]}

Chen, H. S. ^{[1
,51
]}

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

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

Chen, S. J. ^{[33
]}

Chen, X. R. ^{[30
]}

Chen, Y. B. ^{[1
,43
,44
]}

Chu, X. K. ^{[35
]}

Cibinetto, G. ^{[23
]}

Dai, H. L. ^{[1
,43
,44
]}

Dai, J. P. ^{[38
,74
,75
,76
]}

Dbeyssi, A. ^{[14
]}

Dedovich, D. ^{[27
]}

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

Denig, A. ^{[26
]}

Denysenko, I. ^{[27
]}

Destefanis, M. ^{[60
,62
]}

De Mori, F. ^{[60
,62
]}

Ding, Y. ^{[31
]}

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] Bochum Ruhr Univ, D-44780 Bochum, Germany

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

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

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

[8] COMSATS Inst Informat Technol, Def Rd,Raiwind Rd, Lahore 54000, Pakistan

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

[10] GSI Helmholtz Ctr 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, Johann Joachim Becher Weg 45, 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] INFN, Lab Nazl Frascati, I-00044 Frascati, Italy

[21] INFN, I-06100 Perugia, Italy

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

[23] INFN, Sez Ferrara, I-44122 Ferrara, Italy

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

[25] Inst Phys & Technol, Peace Ave 54B, Ulaanbaatar 13330, Mongolia

[26] Johannes Gutenberg Univ Mainz, Johann Joachim Becher Weg 45, D-55099 Mainz, Germany

[27] Joint Inst Nucl Res, Moscow 141980, Russia

[28] Justus Liebig Univ Giessen, Phys Inst 2, Heinrich Buff Ring 16, D-35392 Giessen, Germany

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

[30] Lanzhou Univ, Lanzhou 730000, Gansu, Peoples R China

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

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

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

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

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

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

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

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

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

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

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

[42] Southeast Univ, Nanjing 211100, Jiangsu, Peoples R China

[43] State Key Lab Particle Detect & Elect, Beijing 230026, Anhui, Peoples R China

[44] State Key Lab Particle Detect & Elect, Hefei 230026, Anhui, Peoples R China

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

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

[47] Ankara Univ, TR-06100 Ankara, Turkey

[48] Istanbul Bilgi Univ, TR-34060 Istanbul, Turkey

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

[50] Near East Univ, TR-10 Nicosia, North Cyprus, Turkey

来源：

PHYSICAL REVIEW D | 2017年 / 96卷 / 11期

基金：

瑞典研究理事会; 新加坡国家研究基金会; 中国国家自然科学基金;

关键词：

DECAY;

D O I：

10.1103/PhysRevD.96.112006

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using a sample of 448.1 x 10(6) Psi(3686) events collected with the BESIII detector in 2009 and 2012, we study the decays chi(c0,2) -> eta 'eta ' and eta eta '. The decays chi(c2) -> eta 'eta ', chi(c0) -> eta eta ' and chi(c2) -> eta eta ' are observed for the first time with statistical significances of 9.6 sigma, 13.4 sigma and 7.5 sigma, respectively. The branching fractions are determined to be B(chi(c0) -> eta 'eta ') = (2.19 +/- 0.03 +/- 0.14) x 10(-3), B(chi(c2) -> eta 'eta ') = (4.76 +/- 0.56 +/- 0.38) x 10(-5), B(chi(c0) -> eta eta ') = (8.92 +/- 0.84 +/- 0.65) x 10(-5) and B(chi(c2) -> eta eta ') = (2.27 +/- 0.43 +/- 0.25) x 10(-5), where the first uncertainties are statistical and the second are systematic. The precision for the measurement of B(chi(c0) -> eta 'eta ') thorn is significantly improved compared to previous measurements. Based on the measured branching fractions, the role played by the doubly and singly Okubo-Zweig-Iizuka disconnected transition amplitudes for chi(c0,2) decays into pseudoscalar meson pairs can be clarified.

引用

页数：8

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