| Literature DB >> 12906471 |
J Z Bai1, Y Ban, J G Bian, X Cai, J F Chang, H F Chen, H S Chen, J Chen, Jie Chen, J C Chen, Y B Chen, S P Chi, Y P Chu, X Z Cui, Y M Dai, Y S Dai, L Y Dong, S X Du, Z Z Du, W Dunwoodie, J Fang, S S Fang, C D Fu, H Y Fu, L P Fu, C S Gao, M L Gao, Y N Gao, M Y Gong, W X Gong, S D Gu, Y N Guo, Y Q Guo, Z J Guo, S W Han, F A Harris, J He, K L He, M He, X He, Y K Heng, T Hong, H M Hu, T Hu, G S Huang, L Huang, X P Huang, J M Izen, X B Ji, C H Jiang, X S Jiang, D P Jin, S Jin, Y Jin, B D Jones, Z J Ke, D Kong, Y F Lai, F Li, G Li, H H Li, J Li, J C Li, K Li, Q J Li, R B Li, R Y Li, W Li, W G Li, X Q Li, X S Li, C F Liu, C X Liu, Fang Liu, F Liu, H M Liu, J B Liu, J P Liu, R G Liu, Y Liu, Z A Liu, Z X Liu, X C Lou, G R Lu, F Lu, H J Lu, J G Lu, Z J Lu, X L Luo, E C Ma, F C Ma, J M Ma, R Malchow, Z P Mao, X C Meng, X H Mo, J Nie, Z D Nie, S L Olsen, D Paluselli, H P Peng, N D Qi, C D Qian, J F Qiu, G Rong, D L Shen, H Shen, X Y Shen, H Y Sheng, F Shi, L W Song, H S Sun, S S Sun, Y Z Sun, Z J Sun, S Q Tang, X Tang, D Tian, Y R Tian, W Toki, G L Tong, G S Varner, J Wang, J Z Wang, L Wang, L S Wang, M Wang, Meng Wang, P Wang, P L Wang, W F Wang, Y F Wang, Zhe Wang, Z Wang, Zheng Wang, Z Y Wang, C L Wei, N Wu, X M Xia, X X Xie, G F Xu, Y Xu, S T Xue, M L Yan, W B Yan, G A Yang, H X Yang, J Yang, S D Yang, M H Ye, Y X Ye, J Ying, C S Yu, G W Yu, C Z Yuan, J M Yuan, Y Yuan, Q Yue, S L Zang, Y Zeng, B X Zhang, B Y Zhang, C C Zhang, D H Zhang, H Y Zhang, J Zhang, J M Zhang, J W Zhang, L S Zhang, Q J Zhang, S Q Zhang, X Y Zhang, Y J Zhang, Yiyun Zhang, Y Y Zhang, Z P Zhang, D X Zhao, Jiawei Zhao, J W Zhao, P P Zhao, W R Zhao, Y B Zhao, Z G Zhao, J P Zheng, L S Zheng, Z P Zheng, X C Zhong, B Q Zhou, G M Zhou, L Zhou, N F Zhou, K J Zhu, Q M Zhu, Yingchun Zhu, Y C Zhu, Y S Zhu, Z A Zhu, B A Zhuang, B S Zou.
Abstract
We observe a narrow enhancement near 2m(p) in the invariant mass spectrum of pp pairs from radiative J/psi-->gammapp decays. No similar structure is seen in J/psi-->pi(0)pp decays. The results are based on an analysis of a 58 x 10(6) event sample of J/psi decays accumulated with the BESII detector at the Beijing electron-positron collider. The enhancement can be fit with either an S- or P-wave Breit-Wigner resonance function. In the case of the S-wave fit, the peak mass is below 2m(p) at M=1859(+3)(-10) (stat)+5-25(syst) MeV/c(2) and the total width is Gamma<30 MeV/c(2) at the 90% confidence level. These mass and width values are not consistent with the properties of any known particle.Entities:
Year: 2003 PMID： 12906471 DOI： 10.1103/PhysRevLett.91.022001
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161