Evidence of ψ(3770) non-D(D)over-bar decay to J/ψπ+π-

被引：51

作者：

Bai, JZ

Ban, Y

Bian, JG

Cai, X

Chang, JF

Chen, HF

Chen, HS

Chen, J

Chen, JC

Chen, YB

Chi, SP

Chu, YP

Cui, XZ

Dai, YM

Dai, YS

Dong, LY

Du, SX

Du, ZZ

Fang, J

Fang, SS

Fu, CD

Fu, HY

Fu, LR

Gao, CS

Gao, ML

Gao, YN

Gong, MY

Gong, WX

Gu, SD

Guo, YN

Guo, YQ

Guo, ZJ

Han, SW

Harris, FA

He, J

He, KL

He, M

He, X

Heng, YK

Hong, T

Hu, HM

Hu, T

Huang, GS

Huang, L

Huang, XP

Ji, XB

Jiang, CH

Jiang, XS

Jin, DP

Jin, S

机构：

[1] Inst High Energy Phys, Beijing 100039, Peoples R China

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

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

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

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

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

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

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

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

[10] Shanghai Jiao Tong Univ, Shanghai 200030, Peoples R China

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

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

[13] Univ Hawaii, Honolulu, HI 96822 USA

[14] Univ Sci & Technol China, Anhua 230026, Peoples R China

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

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

来源：

PHYSICS LETTERS B | 2005年 / 605卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1016/j.physletb.2004.11.029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Evidence of psi(3770) decays to a non-D (D) over bar final state is observed. A total of 11.8 +/- 4.8 +/- 1.3 psi(3770) --> J/psipi(+)pi(-) events are obtained from a data sample of 27.7 pb(-1) taken at center-of-mass energies around 3.773 GeV using the BES-II detector at the BEPC. The branching fraction is determined to be BF(psi(3770) --> J/psipi(+)pi(-)) = (0.34 +/- 0.14 +/- 0.09)%, corresponding to the partial width of Gamma(psi(3770) --> J/psipi(+)pi(-)) = (80 +/- 33 +/- 23) keV. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：63 / 71

页数：9

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