Pseudoscalar production at ωω threshold in J/ψ→γωω

被引：43
作者：
Ablikim, M. [1 ]
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] 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] 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] Tsinghua 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：
PHYSICAL REVIEW D | 2006年 / 73卷 / 11期
关键词：
D O I：
10.1103/PhysRevD.73.112007
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The decay channel J/psi ->gamma omega omega, omega ->pi(+)pi(-)pi(0) is analyzed using a sample of 5.8x10(7) J/psi events collected with the BESII detector. The omega omega invariant mass distribution peaks at 1.76 GeV/c(2), just above the omega omega threshold. Analysis of angular correlations indicates that the omega omega system below 2 GeV/c(2) is predominantly pseudoscalar. A partial wave analysis confirms the predominant pseudoscalar structure, together with small 0(++) and 2(++) contributions, and yields a pseudoscalar mass M=1744 +/- 10 (stat)+/- 15 (syst) MeV/c(2), a width Gamma=244(-21)(+24) (stat)+/- 25 (syst) MeV/c(2), and a product branching fraction Br(J/psi ->gamma eta(1760))center dot Br(eta(1760)->omega omega)=(1.98 +/- 0.08 (stat)+/- 0.32 (syst))x10(-3).
引用
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页数：9
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