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Study of the P-wave charmonium state χcJ in ψ/(2S) decays

被引：40
作者：
Bai, JZ [1 ]
Bian, JG
Blum, I
Chai, ZW
Chen, GP
Chen, HF
Chen, J
Chen, JC
Chen, Y
Chen, YB
Chen, YQ
Cheng, BS
Cui, XZ
Ding, HL
Ding, LY
Dong, LY
Du, ZZ
Dunwoodie, W
Feng, S
Gao, CS
Cao, ML
Gao, SQ
Gratton, P
Gu, JH
Gu, SD
Gu, WX
Gu, YF
Guo, YN
Han, SW
Han, Y
Harris, FA
He, J
He, JT
He, M
Hitlin, DG
Hu, GY
Hu, HM
Hu, JL
Hu, QH
Hu, T
Hu, XQ
Huang, JD
Huang, YZ
Izen, JM
Jiang, CH
Jin, Y
Ke, ZJ
Kelsey, MH
Kim, BK
Kong, D
机构：
[1] Inst High Energy Phys, Beijing 100039, Peoples R China
[2] CALTECH, Pasadena, CA 91125 USA
[3] Colorado State Univ, Ft Collins, CO 80523 USA
[4] Hangzhou Univ, Hangzhou 310028, Peoples R China
[5] Shandong Univ, Jinan 250100, Peoples R China
[6] Shanghai Jiao Tong Univ, Shanghai 200030, Peoples R China
[7] Stanford Linear Accelerator Ctr, Stanford, CA 94309 USA
[8] Univ Hawaii, Honolulu, HI 96822 USA
[9] Univ Calif Irvine, Irvine, CA 92717 USA
[10] Univ Sci & Technol China, Hefei 230026, Peoples R China
[11] Univ Texas, Richardson, TX 75083 USA
[12] CCAST, World Lab, Beijing 100080, Peoples R China
来源：
PHYSICAL REVIEW LETTERS | 1998年 / 81卷 / 15期
关键词：
D O I：
10.1103/PhysRevLett.81.3091
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The processes psi(2S) --> gamma pi(+)pi(-), gamma K+K-, and gamma p (p) over bar have been studied using a sample of 3.79 x 10(6) psi(2S) decays. We determine the total width of the chi(c0) to be Gamma(chi c0)(tot) = 14.3 +/- 2.0 +/- 3.0 MeV. We present the first measurement of the branching fraction B(chi(c0) --> p (p) over bar) = (15.9 1 4.3 i 5.3) x 10(-5) where the first error is statistical and the second one is systematic. Branching fractions of chi(c0,2) --> pi(+)pi(-) and K+K- are also reported. [S0031-9007(98)07355-4].
引用
收藏
页码：3091 / 3095
页数：5
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