Partial wave analyses of J/ψ→γπ+π- and γπ0π0

被引：72
作者：
Ablikim, M.
Bai, J. Z.
Ban, Y.
Bian, J. G.
Cai, X.
Chen, H. F.
Chen, H. S.
Chen, H. X.
Chen, J. C.
Chen, Jin
Chen, Y. B.
Chi, S. P.
Chu, Y. P.
Cui, X. Z.
Dai, Y. S.
Diao, L. Y.
Deng, Z. Y.
Dong, Q. F.
Du, S. X.
Fang, J.
Fang, S. S.
Fu, C. D.
Gao, C. S.
Gao, Y. N.
Gu, S. D.
Gu, Y. T.
Guo, Y. N.
Guo, Y. Q.
Guo, Z. J.
Harris, F. A.
He, K. L.
He, M.
Heng, Y. K.
Hu, H. M.
Hu, T.
Huang, G. S.
Huang, X. T.
Ji, X. B.
Jiang, X. S.
Jiang, X. Y.
Jiao, J. B.
Jin, D. P.
Jin, S.
Jin, Yi
Lai, Y. F.
Li, G.
Li, H. B.
Li, H. H.
Li, J.
Li, R. Y.
机构：
[1] Acad Sinica, Inst High Energy Phys, Beijing 100049, Peoples R China
[2] CCAST, 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] Hunan Univ, Changsha 410082, Peoples R China
[8] Jinan Univ, Jinan 250022, 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] Tsing Hua Univ, Beijing 100084, Peoples R China
[16] Univ Hawaii, Honolulu, HI 96822 USA
[17] Univ Sci & Technol China, Hefei 230026, Peoples R China
[18] Wuhan Univ, Wuhan 430072, Peoples R China
[19] Zhejiang Univ, Hangzhou 310028, Peoples R China
来源：
PHYSICS LETTERS B | 2006年 / 642卷 / 5-6期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/j.physletb.2006.10.004
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Results are presented on J/psi radiative decays to pi(+)pi(-) and pi(0)pi(0) based on a sample of 58M J/psi events taken with the BES II detector. Partial wave analyses are carried out using the relativistic covariant tensor amplitude method in the 1.0 to 2.3 GeV/c(2) pi pi mass range. There are conspicuous peaks due to the f(2)(1270) and two 0(++) states in the 1.45 and 1.75 GeV/c(2) mass regions. The first 0(++) state has a mass of 1466 +/- 6 +/- 20 MeV/c(2), a width of 108(-11)(+14) +/- 25 MeV/c(2), and a branching fraction B(J/psi -> gamma f(0)(1500) -> gamma pi(+)pi(-)) = (0.67 +/- 0.02 +/- 0.30) x 10(-4). Spin 0 is strongly preferred over spin 2. The second 0(++) state peaks at 1765(-3)(+4) +/- 13 MeV/c(2) with a width of 145 +/- 8 +/- 69 MeV/c(2). If this 0(++) is interpreted as coming from f(0)(1710), the ratio of its branching fractions to pi pi and K (K) over bar is 0.41(-0.17)(+0.11). (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码：441 / 448
页数：8
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