| Literature DB >> 18352176 |
M Ablikim1, J Z Bai, Y Bai, Y Ban, X Cai, H F Chen, H S Chen, H X Chen, J C Chen, Jin Chen, X D Chen, Y B Chen, Y P Chu, Y S Dai, Z Y Deng, S X Du, J Fang, C D Fu, C S Gao, Y N Gao, S D Gu, Y T Gu, Y N Guo, Z J Guo, F A Harris, K L He, M He, Y K Heng, J Hou, H M Hu, T Hu, G S Huang, X T Huang, Y P Huang, X B Ji, X S Jiang, J B Jiao, D P Jin, S Jin, Y F Lai, H B Li, J Li, R Y Li, W D Li, W G Li, X L Li, X N Li, X Q Li, Y F Liang, H B Liao, B J Liu, C X Liu, Fang Liu, Feng Liu, H H Liu, H M Liu, J B Liu, J P Liu, H B Liu, J Liu, Q Liu, R G Liu, S Liu, Z A Liu, F Lu, G R Lu, J G Lu, C L Luo, F C Ma, H L Ma, L L Ma, Q M Ma, M Q A Malik, Z P Mao, X H Mo, J Nie, S L Olsen, R G Ping, N D Qi, H Qin, J F Qiu, G Rong, X D Ruan, L Y Shan, L Shang, C P Shen, D L Shen, X Y Shen, H Y Sheng, H S Sun, S S Sun, Y Z Sun, Z J Sun, X Tang, J P Tian, G L Tong, G S Varner, X Wan, L Wang, L L Wang, L S Wang, P Wang, P L Wang, W F Wang, Y F Wang, Z Wang, Z Y Wang, C L Wei, D H Wei, Y Weng, N Wu, X M Xia, X X Xie, G F Xu, X P Xu, Y Xu, M L Yan, H X Yang, M Yang, Y X Yang, M H Ye, Y X Ye, C X Yu, G W Yu, C Z Yuan, Y Yuan, S L Zang, Y Zeng, B X Zhang, B Y Zhang, C C Zhang, D H Zhang, H Q Zhang, H Y Zhang, J W Zhang, J Y Zhang, X Y Zhang, Y Y Zhang, Z X Zhang, Z P Zhang, D X Zhao, J W Zhao, M G Zhao, P P Zhao, Z G Zhao, H Q Zheng, J P Zheng, Z P Zheng, B Zhong L Zhou, K J Zhu, Q M Zhu, X W Zhu, Y C Zhu, Y S Zhu, Z A Zhu, Z L Zhu, B A Zhuang, B S Zou.
Abstract
The decays of J/psi --> etaphif(0)(980)[eta --> gammagamma, phi --> K(+) K(-), f(0)(980) --> pi(+)pi(-)] are analyzed using a sample of 5.8 x 10(7) J/psi events collected with the BESII detector at the Beijing Electron-Positron Collider. A structure at around 2.18 GeV/c(2) with about 5 sigma significance is observed in the phif(0)(980) invariant mass spectrum. A fit with a Breit-Wigner function gives the peak mass and width of m = 2.186+/-0.010(stat)+/-0.006(syst) GeV/c(2) and Gamma = 0.065+/-0.023(stat)+/-0.017(syst) GeV/c(2), respectively, which are consistent with those of Y(2175), observed by the BABAR Collaboration in the initial-state radiation process e(+)e(-) --> gamma(ISR) phif(0)(980). The production branching ratio is determined to be Br(J/psi --> etaY(2175))Br(Y(2175)- -> phif(0)(980))Br(f(0)(980) --> pi(+)pi(-)) = [3.23+/-0.75(stat)+/-0.73(syst)] x 10(-4), assuming that the Y(2175) is a 1(--) state.Entities:
Year: 2008 PMID： 18352176 DOI： 10.1103/PhysRevLett.100.102003
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161