Observation Of J/Psi -> P(P)Over-Bara(0)(980) At Besiii

M Ablikim,M N Achasov,X C Ai,O Albayrak,M Albrecht,D Ambrose, F F An, Q An, J Z Bai,R Baldini Ferroli, Y Ban,Dennis W Bennett,J V Bennett,M Bertani,D Bettoni,J M Bian,F Bianchi,E Boger, O Bondarenko, I Boyko,Slawomir Braun, R A Briere,Hui Cai,X Cai,O Cakir,A Calcaterra,G F Cao, S A Cetin,J F Chang, G A Chelkov, G Chen,H S Chen,J C Chen,M L Chen,S J Chen,X R Chen,Y B Chen,H P Cheng,X K Chu,Y P Chu,G Cibinetto, D Croninhennessy,H L Dai,J P Dai,D V Dedovich,Z Y Deng,A G Denig,I Denysenko,M Destefanis,F De Mori, Y Ding, Chaonan Dong,Juan Dong,L Y Dong,M Y Dong,S X Du,J Z Fan,Ji Fang,S S Fang,Y Fang, L Fava,G Felici,C Q Feng,E Fioravanti, C D Fu,O Fuks,Qi Gao,Yanyan Gao, I Garzia, C Geng,K Goetzen,W X Gong,W Gradl, M Greco,M H Gu,Y T Gu,Y H Guan,L B Guo,Tingting Guo,Y P Guo,Z Haddadi,Shuangfeng Han,Y L Han,F A Harris,K L He,Mao He,Z Y He,T Held,Y K Heng,Z L Hou,C Hu,H M Hu,J F Hu,Tongliang Hu,G S Huang,H P Huang,J S Huang,Lan Huang,X T Huang, Yingcai Huang,Tanveer Hussain,C S Ji,Q P Ji,X L Ji,L L Jiang, X S Jiang,J B Jiao,Z Jiao,D P Jin,S Jin,Tord Johansson, A Julin,N Kalantarnayestanaki,X S Kang,M Kavatsyuk, B C Ke, B Kloss, B Kopf,M Kornicer,W Kuehn,A Kupsc, Weiru Lai, J S Lange,M Lara,P Larin,M Leyhe,C H Li,D M Li,Feng Li,Guoying Li,H B Li,J C Li,Keqiu Li,P R Li,Q J Li, T Li,W G Li,X N Li,Z B Li,Han Liang,Y T Liang,D X Lin, B J Liu,C X Liu,F H Liu,H M Liu,J P Liu, K Y Liu, P L Liu, Qiuying Liu, S B Liu,Xin Liu, Y B Liu,Z A Liu, H Loehner,X C Lou, H L Lu,J G Lu,Y P Lu, C L Luo, M X Luo,Ting Luo, X L Luo,Min Lv, X R Lyu,F C Ma,H L Ma,Q M Ma,S Ma,Teng Ma,X Y Ma,F E Maas,M Maggiora,Q A Malik,Y J Mao,Z P Mao,S Marcello,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, F Nerling,I B Nikolaev, Z Ning,S Nisar,X Y Niu,S L Olsen,Qun Ouyang, S Pacetti,P Patteri,M Pelizaeus,H P Peng,K Peters, J L Ping,R G Ping, R Poling,M Qi,Sijin Qian,C F Qiao,L Q Qin,N Qin,X S Qin,Y Qin,Z H Qin,J F Qiu,K H Rashid, C F Redmer, M Ripka, Guoxin Rong,X D Ruan,V Santoro,A V Sarantsev,M Savrie,Karin Schonning, Svenja Schumann,Wenpeng Shan,M Shao, C P Shen, X Y Shen,H Y Sheng,M R Shepherd,W M Song,X Y Song,S Spataro, B Spruck,G X Sun,J F Sun,S S Sun,Y J Sun,Z T Sun,C J Tang,X Tang,I Tapan, E H Thorndike, M Tiemens,D Toth,M Ullrich, I Uman, G Varner,Bo Wang, D Y Wang,Kun Wang,L S Wang,Minggui Wang,P L Wang,Qi Jie Wang,S G Wang,Wei Wang,X F Wang,Y Q Wang, Z Y Wang,D H Wei, J B Wei,P Weidenkaff,S P Wen,Matthias Werner,U Wiedner, M Wolke, Li Hong Wu,N Wu,Zhiyong Wu,L G Xia,Yiben Xia,Dongrong Xiao,Z J Xiao,Y G Xie,Q L Xiu,G F Xu,Lin Xu, Q J Xu,X P Xu,Zhonghua Xue, Linbo Yan,W C Yan, Y H Yan,H X Yang,Li Yang,Y X Yang,Hong Ye,M H Ye,B X Yu,C X Yu,H W Yu, J S Yu, S P Yu, C Z Yuan,W L Yuan,Yuan Yuan, A Yuncu,A A Zafar, A Zallo,S L Zang,Y Zeng,B Y Zhang,C C Zhang,D H Zhang,Hong Yan Zhang,J Q Zhang,S H Zhang,X Y Zhang,Y H Zhang,Z H Zhang,G Zhao,J W Zhao,Lei Zhao,M G Zhao,Q W Zhao,S J Zhao,T C Zhao,Y B Zhao,Z G Zhao, A Zhemchugov,Bojian Zheng,J P Zheng,Y H Zheng,B Zhong,Lingli Zhou,Xun Yu Zhou, K J Zhu, X L Zhu,Y S Zhu,Z A Zhu,J Zhuang, B S Zou,J H Zou

PHYSICAL REVIEW D（2014）

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摘要

Using 2.25 x 10(8) J/psi events collected with the BESIII detector at the BEPCII storage rings, we observe for the first time the process J/psi -> p (p) over bara(0)(980) -> pi(0)eta with a significance of 6.5 sigma (3.2 sigma including systematic uncertainties). The product branching fraction of J/psi -> p (p) over bara(0)(980) -> p (p) over bara(0)pi(0)eta is measured to be (6.8 +/- 1.2 +/- 1.3) x 10(-5), where the first error is statistical and the second is systematic. This measurement provides information on the a(0) production near threshold coupling to p (p) over bar and improves the understanding of the dynamics of J/psi decays to four-body processes.

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