| Literature DB >> 23829729 |
M Ablikim1, M N Achasov, X C Ai, O Albayrak, D J Ambrose, F F An, Q An, J Z Bai, R Baldini Ferroli, Y Ban, J Becker, J V Bennett, M Bertani, J M Bian, E Boger, O Bondarenko, I Boyko, R A Briere, V Bytev, H Cai, X Cai, O Cakir, A Calcaterra, G F Cao, S A Cetin, J F Chang, G Chelkov, G Chen, H S Chen, J C Chen, M L Chen, S J Chen, X Chen, Y B Chen, H P Cheng, Y P Chu, D Cronin-Hennessy, H L Dai, J P Dai, D Dedovich, Z Y Deng, A Denig, I Denysenko, M Destefanis, W M Ding, Y Ding, L Y Dong, M Y Dong, S X Du, J Fang, S S Fang, L Fava, C Q Feng, P Friedel, C D Fu, J L Fu, O Fuks, Q Gao, Y Gao, C Geng, K Goetzen, W X Gong, W Gradl, M Greco, M H Gu, Y T Gu, Y H Guan, A Q Guo, L B Guo, T Guo, Y P Guo, Y L Han, F A Harris, K L He, M He, Z Y He, T Held, Y K Heng, Z L Hou, C Hu, H M Hu, J F Hu, T Hu, G M Huang, G S Huang, J S Huang, L Huang, X T Huang, Y Huang, Y P Huang, T Hussain, C S Ji, Q Ji, Q P Ji, X B Ji, X L Ji, L L Jiang, X S Jiang, J B Jiao, Z Jiao, D P Jin, S Jin, F F Jing, N Kalantar-Nayestanaki, M Kavatsyuk, B Kopf, M Kornicer, W Kühn, W Lai, J S Lange, M Lara, P Larin, M Leyhe, C H Li, Cheng Li, Cui Li, D M Li, F Li, G Li, H B Li, J C Li, K Li, Lei Li, Q J Li, S L Li, W D Li, W G Li, X L Li, X N Li, X Q Li, X R Li, Z B Li, H Liang, Y F Liang, Y T Liang, G R Liao, X T Liao, D Lin, B J Liu, C L Liu, C X Liu, F H Liu, Fang Liu, Feng Liu, H Liu, H B Liu, H H Liu, H M Liu, H W Liu, J P Liu, K Liu, K Y Liu, Kai Liu, P L Liu, Q Liu, S B Liu, X Liu, Y B Liu, Z A Liu, Zhiqiang Liu, Zhiqing Liu, H Loehner, X C Lou, G R Lu, H J Lu, J G Lu, Q W Lu, X R Lu, Y P Lu, C L Luo, M X Luo, T Luo, X L Luo, M Lv, C L Ma, F C Ma, H L Ma, Q M Ma, S Ma, T Ma, X Y Ma, F E Maas, M Maggiora, Q A Malik, Y J Mao, Z P Mao, J G Messchendorp, J Min, T J Min, R E Mitchell, X H Mo, Y J Mo, H Moeini, C Morales Morales, K Moriya, N Yu Muchnoi, H Muramatsu, Y Nefedov, C Nicholson, I B Nikolaev, Z Ning, S L Olsen, Q Ouyang, S Pacetti, J W Park, M Pelizaeus, H P Peng, K Peters, J L Ping, R G Ping, R Poling, E Prencipe, M Qi, S Qian, C F Qiao, L Q Qin, X S Qin, Y Qin, Z H Qin, J F Qiu, K H Rashid, G Rong, X D Ruan, A Sarantsev, B D Schaefer, M Shao, C P Shen, X Y Shen, H Y Sheng, M R Shepherd, W M Song, X Y Song, S Spataro, B Spruck, D H Sun, G X Sun, J F Sun, S S Sun, Y J Sun, Y Z Sun, Z J Sun, Z T Sun, C J Tang, X Tang, I Tapan, E H Thorndike, D Toth, M Ullrich, I Uman, G S Varner, B Q Wang, D Wang, D Y Wang, K Wang, L L Wang, L S Wang, M Wang, P Wang, P L Wang, Q J Wang, S G Wang, X F Wang, X L Wang, Y D Wang, Y F Wang, Y Q Wang, Z Wang, Z G Wang, Z Y Wang, D H Wei, J B Wei, P Weidenkaff, Q G Wen, S P Wen, M Werner, U Wiedner, L H Wu, N Wu, S X Wu, W Wu, Z Wu, L G Xia, Y X Xia, Z J Xiao, Y G Xie, Q L Xiu, G F Xu, G M Xu, Q J Xu, Q N Xu, X P Xu, Z R Xu, F Xue, Z Xue, L Yan, W B Yan, Y H Yan, H X Yang, Y Yang, Y X Yang, H Ye, M Ye, M H Ye, B X Yu, C X Yu, H W Yu, J S Yu, S P Yu, C Z Yuan, Y Yuan, A A Zafar, A Zallo, S L Zang, Y Zeng, B X Zhang, B Y Zhang, C Zhang, C C Zhang, D H Zhang, H H Zhang, H Y Zhang, J Q Zhang, J W Zhang, J Y Zhang, J Z Zhang, LiLi Zhang, R Zhang, S H Zhang, X J Zhang, X Y Zhang, Y Zhang, Y H Zhang, Z P Zhang, Z Y Zhang, Zhenghao Zhang, G Zhao, H S Zhao, J W Zhao, K X Zhao, Lei Zhao, Ling Zhao, M G Zhao, Q Zhao, S J Zhao, T C Zhao, X H Zhao, Y B Zhao, Z G Zhao, A Zhemchugov, B Zheng, J P Zheng, Y H Zheng, B Zhong, L Zhou, X Zhou, X K Zhou, X R Zhou, C Zhu, K Zhu, K J Zhu, S H Zhu, X L Zhu, Y C Zhu, Y M Zhu, Y S Zhu, Z A Zhu, J Zhuang, B S Zou, J H Zou.
Abstract
We study the process ee+ e- → π+ π- J/ψ at a center-of-mass energy of 4.260 GeV using a 525 pb(-1) data sample collected with the BESIII detector operating at the Beijing Electron Positron Collider. The Born cross section is measured to be (62.9±1.9±3.7) pb, consistent with the production of the Y(4260). We observe a structure at around 3.9 GeV/c2 in the π(±)J/ψ mass spectrum, which we refer to as the Z(c)(3900). If interpreted as a new particle, it is unusual in that it carries an electric charge and couples to charmonium. A fit to the π(±)J/ψ invariant mass spectrum, neglecting interference, results in a mass of (3899.0±3.6±4.9) MeV/c2 and a width of (46±10±20) MeV. Its production ratio is measured to be R = (σ(e+ e- → π(±)Z(c)(3900)(∓) → π+ π- J/ψ)/σ(e+ e- → π+ π- J/ψ)) = (21.5±3.3±7.5)%. In all measurements the first errors are statistical and the second are systematic.Entities:
Year: 2013 PMID： 23829729 DOI： 10.1103/PhysRevLett.110.252001
Source DB: PubMed Journal: Phys Rev Lett ISSN： 0031-9007 Impact factor: 9.161