Study of J/ψ decays into ηK0(K)over-bar0 BES Collaboration

被引：98

作者：

Ablikim, M. ^{[2
]}

Bai, J. Z. ^{[2
]}

Bai, Y. ^{[2
]}

Ban, Y. ^{[12
]}

Cai, X. ^{[2
]}

Chen, H. F. ^{[16
]}

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

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

Chen, J. C. ^{[2
]}

Chen, Jin ^{[2
]}

Chen, X. D. ^{[6
]}

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

Chu, Y. P. ^{[2
]}

Dai, Y. S. ^{[18
]}

Deng, Z. Y. ^{[2
]}

Du, S. X. ^{[2
]}

Fang, J. ^{[2
]}

Fu, C. D. ^{[2
]}

Gao, C. S. ^{[2
]}

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

Gu, S. D. ^{[2
]}

Gu, Y. T. ^{[5
]}

Guo, Y. N. ^{[2
]}

Guo, Z. J. ^{[15
]}

Harris, F. A. ^{[15
]}

He, K. L. ^{[2
]}

He, M. ^{[13
]}

Heng, Y. K. ^{[2
]}

Hu, H. M. ^{[2
]}

Hu, T. ^{[2
]}

Huang, G. S. ^{[2
]}

Huang, X. T. ^{[13
]}

Huang, Y. P. ^{[2
]}

Ji, X. B. ^{[2
]}

Jiang, X. S. ^{[2
]}

Jiao, J. B. ^{[13
]}

Jin, D. P. ^{[2
]}

Jin, S. ^{[2
]}

Li, G. ^{[2
]}

Li, H. B. ^{[2
]}

Li, J. ^{[2
]}

Li, L. ^{[2
]}

Li, R. Y. ^{[2
]}

Li, W. D. ^{[2
]}

Li, W. G. ^{[2
]}

Li, X. L. ^{[2
]}

Li, X. N. ^{[2
]}

Li, X. Q. ^{[11
]}

Liang, Y. F. ^{[14
]}

Liu, B. J. ^{[2
]}

机构：

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

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

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

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

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

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

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

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

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

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

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

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

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

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

[15] Univ Hawaii, Honolulu, HI 96822 USA

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

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

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

来源：

PHYSICS LETTERS B | 2010年 / 685卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Y(4260); HYBRID; STATE; Y(2175);

D O I：

10.1016/j.physletb.2010.01.063

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We report the first observation of J/psi -> eta K*(0)(K) over bar*(0) decay in a J/psi sample of 58 million events collected with the BESII detector. The branching fraction is determined to be (1.15 +/- 0.13 +/- 0.22) x 10(-3). The selected signal event sample is further used to search for the Y(2175) resonance through J/psi -> eta Y(2175), Y(2175) -> K*(0)(K) over bar*(0). No evidence of a signal is seen. An upper limit of Br(J/psi -> eta Y(2175)). Br(Y(2175) -> K*(0)(K) over bar*(0)) < 2.52 x 10(-4) is set at the 90% confidence level. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：27 / 32

页数：6

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Study of J/ψ decays into ηK*0(K)over-bar*0 BES Collaboration

Study of J/ψ decays into ηK0(K)over-bar0 BES Collaboration