Search for the C-parity violating process J/ψ → γγ via ψ(2S) → π+π- J/ψ

被引：2

作者：

Ablikim, M. ^{[1
]}

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

Ban, Y. ^{[10
]}

Cai, X. ^{[1
]}

Chen, H. F. ^{[15
]}

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

Chen, H. X.

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

Chen, Jin ^{[1
]}

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

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

Dai, Y. S. ^{[17
]}

Diao, L. Y. ^{[7
]}

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

Dong, Q. F. ^{[13
]}

Du, S. X. ^{[1
]}

Fang, J. ^{[1
]}

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

Fu, C. D. ^{[13
]}

Gao, C. S. ^{[1
]}

Gao, Y. N. ^{[13
]}

Gu, S. D. ^{[1
]}

Gu, Y. T. ^{[4
]}

Guo, Y. N. ^{[1
]}

Guo, Z. J. ^{[14
]}

Harris, F. A. ^{[14
]}

He, K. L. ^{[1
]}

He, M. ^{[11
]}

Heng, Y. K. ^{[1
]}

Hou, J. ^{[9
]}

Hu, H. M. ^{[1
]}

Hu, J. H.

Hu, T. ^{[1
]}

Huang, G. S. ^{[1
]}

Huang, X. T. ^{[11
]}

Ji, X. B. ^{[1
]}

Jiang, X. S. ^{[1
]}

Jiang, X. Y. ^{[5
]}

Jiao, J. B.

Jin, D. P. ^{[1
]}

Jin, S. ^{[1
]}

Lai, Y. F. ^{[1
]}

Li, G. ^{[1
]}

Li, H. B. ^{[1
]}

Li, J. ^{[1
]}

Li, R. Y. ^{[1
]}

Li, S. M. ^{[1
]}

Li, W. D. ^{[1
]}

Li, W. G. ^{[1
]}

Li, X. L. ^{[1
]}

机构：

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

[2] China Ctr Adv Sci & Technol, Beijing 100080, Peoples R China

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

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

[5] Henan Normal Univ, Xinxiang 453002, Peoples R China

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

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

[8] Nanjing Normal Univ, Nanjing 210097, Peoples R China

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

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

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

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

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

[14] Univ Hawaii, Honolulu, HI 96822 USA

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

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

[17] Zhejiang Univ, Hangzhou 310028, Peoples R China

[18] Ruhr Univ Bochum, Inst Expt Phys 1, D-44780 Bochum, Germany

来源：

PHYSICAL REVIEW D | 2007年 / 76卷 / 11期

关键词：

D O I：

10.1103/PhysRevD.76.117101

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using 14.0x10(6)psi(2S) events collected with the BES-II detector, the C-parity violating process J/psi -> gamma gamma via psi(2S) -> pi(+)pi(-)J/psi is studied. We determine a new upper limit for the J/psi ->gamma gamma branching ratio of B(J/psi ->gamma gamma) < 2.2x10(-5) at the 90% C.L., which is about 20 times lower than the previous measurement.

引用

页数：4

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