The σ pole in J/ψ→ωπ+π-

被引：203

作者：

Ablikim, M

Bai, JZ

Ban, Y

Bian, JG

Bugg, D

Cai, X

Chang, JF

Chen, HF

Chen, HS

Chen, HX

Chen, JC

Chen, J

Chen, ML

Chen, YB

Chi, SP

Chu, YP

Cui, XZ

Dai, HL

Dai, YS

Deng, ZY

Dong, LY

Du, SX

Du, ZZ

Fang, J

Fang, SS

Fu, CD

Fu, HY

Gao, CS

Gao, YN

Gong, MY

Gong, WX

Gu, SD

Guo, YN

Guo, YQ

Guo, ZJ

Harris, FA

He, KL

He, M

He, X

Heng, YK

Hu, HM

Hu, T

Huang, GS

Huang, L

Huang, XP

Ji, XB

Jia, QY

Jiang, CH

Jiang, XS

机构：

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

[2] CCAST, Beijing 100080, Peoples R China

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

[4] Henan Normal Univ, Xining 453002, Peoples R China

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

[6] Hunan Univ, Changsha 410082, 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] Shanghai Jiao Tong Univ, Shanghai 200030, Peoples R China

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

[14] Tsing Hua Univ, Beijing 100084, Peoples R China

[15] Univ Hawaii, Honolulu, HI 96822 USA

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

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

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

[19] Univ London Queen Mary Coll, London E1 4NS, England

来源：

PHYSICS LETTERS B | 2004年 / 598卷 / 3-4期

关键词：

D O I：

10.1016/j.physletb.2004.07.052

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Using a sample of 58 million J/psi events recorded in the BESII detector, the decay J/psi --> omegapi(+)pi(-) is studied. There are conspicuous omegaf(2)(1270) and b(1)(1235)pi signals. At low pipi mass, a large, broad peak due to the sigma is observed, and its pole position is determined to be (541 +/- 39) - i (252 +/- 42) MeV from the mean of six analyses. The errors, which are dominated by the systematic errors, cover the statistical and systematic errors in the six analyses, as well as the observed variation of the six analyses. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：149 / 158

页数：10

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