Study of the J/Ψ decays to ΛΛ and Σ0Σ0

被引：31
作者：
Ablikirn, M
Bai, JZ
Ban, Y
Bian, JG [1 ]
Cai, X
Chen, HF
Chen, HS
Chen, HX
Chen, JC
Chen, J
Chen, YB
Chi, SP
Chu, YP
Cui, XZ
Dai, YS
Deng, ZY
Dong, LY
Dong, QF
Du, SX
Du, ZZ
Fang, J
Fang, SS
Fu, CD
Gao, CS
Gao, YN
Gu, SD
Gu, YT
Guo, YN
Guo, YQ
Guo, ZJ
Harris, FA
He, KL
He, M
Heng, YK
Hu, HM
Hu, T
Huang, GS
Huang, XP
Huang, XT
Ji, XB
Jiang, XS
Jiao, JB
Jin, DP
Jin, S
Jin, Y
Lai, YF
Li, G
Li, HB
Li, HH
Li, J
机构：
[1] 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] Liaoning Univ, Shenyang 110036, Peoples R China
[9] Nanjing Normal Univ, Nanjing 210097, Peoples R China
[10] Nankai Univ, Tianjin 300071, Peoples R China
[11] Peking Univ, Beijing 100871, Peoples R China
[12] Shandong Univ, Jinan 250100, Peoples R China
[13] Sichuan Univ, Chengdu 610064, Peoples R China
[14] Tsinghua Univ, Beijing 100084, Peoples R China
[15] Univ Hawaii, Honolulu, HI 96822 USA
[16] Univ Sci & Technol China, Hefei 230026, Peoples R China
[17] Wuhan Univ, Wuhan 430072, Peoples R China
[18] Zhejiang Univ, Hangzhou 310028, Peoples R China
来源：
PHYSICS LETTERS B | 2006年 / 632卷 / 2-3期
基金：
中国国家自然科学基金;
关键词：
D O I：
10.1016/j.physletb.2005.10.079
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
Using 58 million J/psi events collected by the BES-II detector at the BEPC, the decays J/psi -> Lambda Lambda and Sigma(0)Sigma(0) are analysed. The branching fractions are measured to be Br(J/psi -> Lambda Lambda) = (2.03 +/- 0.03 +/- 0.15) x 10(-3) and Br(J/psi -> Sigma(0)Sigma(0)) = (1.33 +/- 0.04 +/- 0.11) x 10(-3). The angular distribution is of the form dN/dcos theta = N-0(1 + alpha cos(2)theta), with alpha = 0.65 +/- 0.11 +/- 0.03 for J/psi -> Lambda Lambda and alpha = -0.24 +/- 0.19 +/- 0.07 for J/psi -> Sigma(0)Sigma(0). (c) 2005 Elsevier B.V. All rights reserved.
引用
收藏
页码：181 / 186
页数：6
相关论文
共 13 条
  • [1] Bai JZ, 2004, PHYS LETT B, V591, P42, DOI 10.1016/j.physletb.2004.04-022
  • [2] Bai JZ, 2002, HIGH ENERG PHYS NUC, V26, P93
  • [3] The BES upgrade
    Bai, JZ
    Bao, HC
    Blum, I
    Chai, ZW
    Chen, GP
    Chen, HF
    Chen, J
    Chen, JC
    Chen, Y
    Chen, YB
    Chen, YQ
    Cheng, BS
    Chu, XM
    Cui, XZ
    Ding, HL
    Ding, WY
    Dong, LY
    Du, YY
    Du, ZZ
    Dunwoodie, W
    Fang, J
    Fang, WZ
    Gao, CS
    Gao, ML
    Gao, SQ
    Gratton, P
    Gu, JH
    Gu, SD
    Gu, WX
    Guo, YN
    Han, HG
    Han, SW
    Harris, FA
    Han, Y
    He, J
    He, M
    Heng, YK
    Hitlin, DG
    Hu, GY
    Hu, HB
    Hu, HM
    Hu, JL
    Hu, QH
    Hu, T
    Hu, XQ
    Huang, GS
    Huang, JD
    Huang, YZ
    Izen, JM
    Jiang, CH
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2001, 458 (03) : 627 - 637
  • [4] Decays of the J/Ψ to Λ(Λ)over-bar, Λ(Λ)over-barγ and Λ(Λ)over-barπ0 final states
    Bai, JZ
    Bian, JG
    Chai, ZW
    Chen, GP
    Chen, HF
    Chen, JC
    Chen, Y
    Chen, YB
    Chen, YQ
    Cheng, BS
    Cui, XZ
    Ding, HL
    Ding, LY
    Dong, LY
    Du, ZZ
    Feng, S
    Gao, CS
    Gao, ML
    Gao, SQ
    Gu, JH
    Gu, SD
    Gu, WX
    Gu, YF
    Guo, YN
    Han, SW
    Han, Y
    He, J
    He, JT
    He, M
    Hu, GY
    Hu, HM
    Hu, JL
    Hu, QH
    Hu, T
    Hu, XQ
    Huang, JD
    Huang, YZ
    Jiang, CH
    Jin, Y
    Ke, ZJ
    Lai, YF
    Lang, PF
    Li, CG
    Li, D
    Li, HB
    Li, J
    Li, PQ
    Li, RB
    Li, W
    Li, WD
    [J]. PHYSICS LETTERS B, 1998, 424 (1-2) : 213 - 218
  • [5] Carimalo C., 1987, International Journal of Modern Physics A, V2, P249, DOI 10.1142/S0217751X87000107
  • [6] ISOSPIN VIOLATION IN J /PSI-] BARYON + ANTI-BARYON
    CLAUDSON, M
    GLASHOW, SL
    WISE, MB
    [J]. PHYSICAL REVIEW D, 1982, 25 (05): : 1345 - 1347
  • [7] CORDS D, 1978, 7832 DESY
  • [8] DECAYS OF THE PSI(3097) TO BARYON-ANTIBARYON FINAL-STATES
    EATON, MW
    GOLDHABER, G
    ABRAMS, GS
    BLOCKER, CA
    CARITHERS, WC
    CHINOWSKY, W
    COLES, MW
    COOPER, S
    DIETERLE, WE
    DILLON, JB
    GIDAL, G
    JOHNSON, AD
    KADYK, JA
    LANKFORD, AJ
    LEVI, M
    MILLIKAN, RE
    NELSON, ME
    PANG, CY
    PATRICK, JF
    STRAIT, J
    TRILLING, GH
    VELLA, E
    VIDEAU, I
    ALAM, MS
    BOYARSKI, AM
    BREIDENBACH, M
    BURKE, DL
    DORENBOSCH, J
    DORFAN, JM
    FELDMAN, GJ
    FRANKLIN, MEB
    HANSON, G
    HAYES, KG
    HIMEL, T
    HITLIN, DG
    HOLLEBEEK, RJ
    INNES, WR
    JAROS, JA
    JENNI, P
    LARSEN, RR
    LUTH, V
    PERL, ML
    RICHTER, B
    ROUSSARIE, A
    SCHARRE, DL
    SCHINDLER, RH
    SCHWITTERS, RF
    SIEGRIST, JL
    TAUREG, H
    TONUTTI, M
    [J]. PHYSICAL REVIEW D, 1984, 29 (05): : 804 - 821
  • [9] Review of particle physics
    Eidelman, S
    Hayes, KG
    Olive, KA
    Aguilar-Benitez, M
    Amsler, C
    Asner, D
    Babu, KS
    Barnett, RM
    Beringer, J
    Burchat, PR
    Carone, CD
    Caso, C
    Conforto, G
    Dahl, O
    D'Ambrosio, G
    Doser, M
    Feng, JL
    Gherghetta, T
    Gibbons, L
    Goodman, M
    Grab, C
    Groom, DE
    Gurtu, A
    Hagiwara, K
    Hernández-Rey, JJ
    Hikasa, K
    Honscheid, K
    Jawahery, H
    Kolda, C
    Kwon, Y
    Mangano, ML
    Manohar, AV
    March-Russell, J
    Masoni, A
    Miquel, R
    Mönig, K
    Murayama, H
    Nakamura, K
    Navas, S
    Pape, L
    Patrignani, C
    Piepke, A
    Raffelt, G
    Roos, M
    Tanabashi, M
    Terning, J
    Törnqvist, NA
    Trippe, TG
    Vogel, P
    Wohl, CG
    [J]. PHYSICS LETTERS B, 2004, 592 (1-4) : 1 - 1109
  • [10] Fang SS, 2003, HIGH ENERG PHYS NUC, V27, P277
12