Measurements of the branching fractions for J/ψ and ψ′ → Λ(Λ)over-barπ0 and Λ(Λ)over-barη

Ablikim, M.; Achasov, M.; Albayrak, O.; Ambrose, D.; An, F.; An, Q.; Bai, J.; Ban, Y.; Becker, J.; Bennett, J.; Bertani, M.; Bian, J.; Boger, E.; Bondarenko, O.; Boyko, I.; Briere, R.; Bytev, V.; Cai, X.; Cakir, O.; Calcaterra, A.; Cao, G.; Cetin, S.; Chang, J.; Chelkov, G.; Chen, G.; Chen, H.; Chen, J.; Chen, M.; Chen, S.; Chen, X.; Chen, Y.; Cheng, H.; Chu, Y.; Cronin-Hennessy, D.; Dai, H.; Dai, J.; Dedovich, D.; Deng, Z.; Denig, A.; Denysenko, I.; Destefanis, M.; Ding, W.; Ding, Y.; Dong, L.; Dong, M.; Du, S.; Fang, J.; Fang, S.; Fava, L.; Feng, C.; Ferroli, R.; Friedel, P.; Fu, C.; Gao, Y.; Geng, C.; Goetzen, K.; Gong, W.; Gradl, W.; Greco, M.; Gu, M.; Gu, Y.; Guan, Y.; Guo, A.; Guo, L.; Guo, T.; Guo, Y.; Han, Y.; Harris, F.; He, K.; He, M.; He, Z.; Held, T.; Heng, Y.; Hou, Z.; Hu, C.; Hu, H.; Hu, J.; Hu, T.; Huang, G.; Huang, G.; Huang, J.; Huang, L.; Huang, X.; Huang, Y.; Huang, Y.; Hussain, T.; Ji, C.; Ji, Q.; Ji, Q.; Ji, X.; Ji, X.; Jiang, L.; Jiang, X.; Jiao, J.; Jiao, Z.; Jin, D.; Jin, S.; Jing, F.; Kalantar-Nayestanaki, N.; Kavatsyuk, M.; Kopf, B.; Kornicer, M.; Kuehn, W.; Lai, W.; Lange, J.; Leyhe, M.; Li, C.; Li, Cheng; Li, Cui; Li, D.; Li, F.; Li, G.; Li, H.; Li, J.; Li, K.; Li, Lei; Li, Q.; Li, S.; Li, W.; Li, W.; Li, X.; Li, X.; Li, X.; Li, X.; Li, Z.; Liang, H.; Liang, Y.; Liang, Y.; Liao, G.; Liao, X.; Lin, D.; Liu, B.; Liu, C.; Liu, C.; Liu, F.; Liu, Fang; Liu, Feng; Liu, H.; Liu, H.; Liu, H.; Liu, H.; Liu, H.; Liu, J.; Liu, K.; Liu, K.; Liu, Kai; Liu, P.; Liu, Q.; Liu, S.; Liu, X.; Liu, Y.; Liu, Z.; Liu, Zhiqiang; Liu, Zhiqing; Loehner, H.; Lu, G.; Lu, H.; Lu, J.; Lu, Q.; Lu, X.; Lu, Y.; Luo, C.; Luo, M.; Luo, T.; Luo, X.; Lv, M.; Ma, C.; Ma, F.; Ma, H.; Ma, Q.; Ma, S.; Ma, T.; Ma, X.; Maas, F.; Maggiora, M.; Malik, Q.; Mao, Y.; Mao, Z.; Messchendorp, J.; Min, J.; Min, T.; Mitchell, R.; Mo, X.; Morales, C.; Muchnoi, N.; Muramatsu, H.; Nefedov, Y.; Nicholson, C.; Nikolaev, I.; Ning, Z.; Olsen, S.; Ouyang, Q.; Pacetti, S.; Park, J.; Pelizaeus, M.; Peng, H.; Peters, K.; Ping, J.; Ping, R.; Poling, R.; Prencipe, E.; Qi, M.; Qian, S.; Qiao, C.; Qin, L.; Qin, X.; Qin, Y.; Qin, Z.; Qiu, J.; Rashid, K.; Rong, G.; Ruan, X.; Sarantsev, A.; Schaefer, B.; Shao, M.; Shen, C.; Shen, X.; Sheng, H.; Shepherd, M.; Song, X.; Spataro, S.; Spruck, B.; Sun, D.; Sun, G.; Sun, J.; Sun, S.; Sun, Y.; Sun, Y.; Sun, Z.; Sun, Z.; Tang, C.; Tang, X.; Tapan, İLHAN; Thorndike, E.; Toth, D.; Ullrich, M.; Varner, G.; Wang, B.; Wang, D.; Wang, D.; Wang, K.; Wang, L.; Wang, L.; Wang, M.; Wang, P.; Wang, P.; Wang, Q.; Wang, S.; Wang, X.; Wang, X.; Wang, Y.; Wang, Z.; Wang, Z.; Wang, Z.; Wei, D.; Wei, J.; Weidenkaff, P.; Wen, Q.; Wen, S.; Werner, M.; Wiedner, U.; Wu, L.; Wu, N.; Wu, S.; Wu, W.; Wu, Z.; Xia, L.; Xia, Y.; Xiao, Z.; Xie, Y.; Xiu, Q.; Xu, G.; Xu, G.; Xu, Q.; Xu, Q.; Xu, X.; Xu, Z.; Xue, F.; Xue, Z.; Yan, L.; Yan, W.; Yan, Y.; Yang, H.; Yang, Y.; Yang, Y.; Ye, H.; Ye, M.; Ye, M.; Yu, B.; Yu, C.; Yu, H.; Yu, J.; Yu, S.; Yuan, C.; Yuan, Y.; Zafar, A.; Zallo, A.; Zeng, Y.; Zhang, B.; Zhang, B.; Zhang, C.; Zhang, C.; Zhang, D.; Zhang, H.; Zhang, H.; Zhang, J.; Zhang, J.; Zhang, J.; Zhang, J.; Zhang, Lili; Zhang, R.; Zhang, S.; Zhang, X.; Zhang, X.; Zhang, Y.; Zhang, Y.; Zhang, Z.; Zhang, Z.; Zhang, Zhenghao; Zhao, G.; Zhao, H.; Zhao, J.; Zhao, K.; Zhao, Lei; Zhao, Ling; Zhao, M.; Zhao, Q.; Zhao, Q.; Zhao, S.; Zhao, T.; Zhao, Y.; Zhao, Z.; Zhemchugov, A.; Zheng, B.; Zheng, J.; Zheng, Y.; Zhong, B.; Zhong, Z.; Zhou, L.; Zhou, X.; Zhou, X.; Zhu, C.; Zhu, K.; Zhu, K.; Zhu, S.; Zhu, X.; Zhu, Y.; Zhu, Y.; Zhu, Y.; Zhu, Z.; Zhuang, J.; Zou, B.; Zou, J.

doi:10.1103/physrevd.87.052007

Measurements of the branching fractions for J/ψ and ψ′ → Λ(Λ)over-barπ0 and Λ(Λ)over-barη

Atıf İçin Kopyala

Ablikim M., Achasov M. N., Albayrak O., Ambrose D. J., An F. F., An Q., ...Daha Fazla

PHYSICAL REVIEW D, cilt.87, sa.5, 2013 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 87 Sayı: 5
Basım Tarihi: 2013
Doi Numarası: 10.1103/physrevd.87.052007
Dergi Adı: PHYSICAL REVIEW D
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Bursa Uludağ Üniversitesi Adresli: Hayır

Özet

We report on a study of the isospin-violating and isospin-conserving decays of the J/psi and psi' charmonium state to Lambda(Lambda) over bar pi(0) and Lambda(Lambda) over bar eta, respectively. The data are based on 225 million J/psi and 106 million psi' events that were collected with the BESIII detector. The most accurate measurement of the branching fraction of the isospin-violating process J/psi -> Lambda(Lambda) over bar pi(0) is obtained, and the isospin-conserving processes J/psi -> Lambda(Lambda) over bar eta and psi' -> Lambda(Lambda) over bar eta are observed for the first time. The branching fractions are measured to be B(J/psi -> Lambda(Lambda) over bar pi(0)) = (3.78 +/- 0.27(stat) +/- 0.30(sys)) x 10(-5), B(J/psi -> Lambda(Lambda) over bar eta) = (15.7 +/- 0.80(stat) +/- 1.54(sys)) x 10(-5) and B(psi' -> Lambda(Lambda) over bar eta) = (2.48 +/- 0.34(stat) +/- 0.19(sys)) x 10(-5). No significant signal events are observed for psi' -> Lambda(Lambda) over bar pi(0) decay resulting in an upper limit of the branching fraction of B(psi' -> Lambda(Lambda) over bar pi(0)) < 0.29 x 10(-5) at the 90% confidence level. The two-body decay of J/psi -> Sigma(1385)(0)<(Lambda)over bar> + c.c. is searched for, and the upper limit is B(J/psi -> Sigma(1385)(0)(Lambda) over bar + c.c.) < 0.82 x 10(-5) at the 90% confidence level. DOI: 10.1103/PhysRevD.87.052007

Measurements of the branching fractions for <i>J</i>/ψ and ψ′ → Λ(Λ)over-barπ<SUP>0</SUP> and Λ(Λ)over-barη

Özet