Study Of E(+)E(-) -> P(P)Over-Bar Pi(0) In The Vicinity Of The Psi(3770)

M Ablikim,M N Achasov,X C Ai,O Albayrak,Martin Albrecht,D Ambrose, F F An,Qinglong An,J Z Bai,R Baldini Ferroli, Y Ban,J V Bennett,M Bertani,J M Bian,E Boger, O Bondarenko, I Boyko, S Braun,R A Briere,Hui Cai,Xin 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,D Croninhennessy,H L Dai,J P Dai,D V Dedovich, Z Y Deng,A G Denig,I Denysenko,M Destefanis,W M Ding, Yue Ding,Chunhua Dong,Jing Dong, L Y Dong,M Y Dong,S X Du,J Z Fan,Jiaxiong Fang,S S Fang,Y Fang, L Fava,C Q Feng, C D Fu,O Fuks,Qian Gao,Yongsheng 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,Mao He,Z Y He,T Held,Y K Heng,Z L Hou,C Hu,H M Hu,J F Hu, T Hu,G S Huang, H P Huang,J S Huang,Long Huang,X T Huang,Y Huang,T Hussain,C S Ji,Q P Ji,X L Ji, L W Jiang,X S Jiang,J B Jiao,Zhiyong Jiao,D P Jin, S Jin,Tord Johansson,N Kalantarnayestanaki,X S Kang,M Kavatsyuk, B Kloss, B Kopf,M Kornicer,W Kuehn,A Kupsc,Weichi Lai, J S Lange, Marcia Lara,P Larin,M Leyhe,C H Li,D M Li, F Li,Guo Li,H B Li,J C Li,K Li, Lei Li,P R Li,Q J Li, T Li,W D Li, X L Li, Z B Li,H Liang,Y F Liang,D X Lin, B J Liu, C L Liu, F H Liu, H B Liu, J P Liu, K Y Liu, P L Liu,Qianqian Liu, S B Liu, Xiuheng Liu, Y B Liu,Z A Liu, H Loehner,X C Lou,G R Lu,H J Lu,J G Lu,X R Lu,Y P Lu, C L Luo, M X Luo,Tao Luo, X L Luo,M Lv,F C Ma,H L Ma,Q M Ma,S Ma,Tao 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,I B Nikolaev, Z Ning,S Nisar,X Y Niu,S L Olsen, Q Ouyang,S Pacetti,M Pelizaeus,H P Peng,K Peters, J L Ping,R G Ping, R Poling, M Qi, S Qian,C F Qiao,L Q Qin,X S Qin,Y Qin,Z H Qin,J F Qiu,K H Rashid, C F Redmer, M Ripka,G Rong,X D Ruan, A V Sarantsev,Karin Schonning,S Schumann, W Shan,Ming 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 J Sun,C J Tang,Xiaodong Tang,I Tapan, E H Thorndike,D Toth, M S Ullrich, I Uman, G Varner,Binbin Wang,D Y Wang,Kemin Wang,L S Wang,Mingwei Wang,P L Wang,Q J Wang,S G Wang, Wang Wang,X F Wang,Y Q Wang,Z Y Wang,D H Wei, J B Wei,P Weidenkaff,S P Wen,M Werner,U Wiedner,M Wolke,L H Wu,N Wu, Zhixian Wu,L G Xia,Yiben Xia,D Xiao,Z J Xiao,Y G Xie,Q L Xiu,G F Xu,Lili Xu, Q N Xu,X P Xu,Zhaojie Xue,Ling Yan,W C Yan, Y H Yan,H X Yang,Li Yang,Y X Yang,Haimin 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,Yongfei Zeng, B X Zhang,C B Zhang, D H Zhang, H Y Zhang,Jian J Zhang, S H Zhang, X Y Zhang, Y H Zhang, Z Y Zhang,G Zhao,J W Zhao,Lei Zhao,M G Zhao,Q W Zhao,S J Zhao,T C Zhao,X H Zhao,Y B Zhao,Z G Zhao, A Zhemchugov,Biao Zheng,J P Zheng, Y H Zheng,B Zhong, Li Zhou,X Y Zhou, K J Zhu, X L Zhu,Y C Zhu,Z A Zhu, J Zhuang, B S Zou,J H Zou

PHYSICAL REVIEW D（2014）

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摘要

The process e(+)e(-) -> p (p) over bar pi(0) has been studied by analyzing data collected at root s = 3.773 GeV, root s = 3.650 GeV, and during a psi(3770) line shape scan with the BESIII detector at the BEPCII collider. The Born cross section of p (p) over bar pi(0) in the vicinity of the psi(3770) is measured, and the Born cross section of psi(3770) -> p (p) over bar pi(0) is extracted considering interference between resonant and continuum production amplitudes. Two solutions with the same probability and a significance of 1.5 sigma are found. The solutions for the Born cross section of psi(3770) -> p (p) over bar pi(0) are 33.8 +/- 1.8 +/- 2.1 pb and 0.06(-0.04-0.01)(+0.10+0.01) pb (< 0.22 pb at a 90% confidence level). Using the estimated cross section and a constant decay amplitude approximation, the cross section sigma(p<(p)over bar> -> psi(3770)pi(0)) is calculated for the kinematic situation of the planned (p) over bar ANDA experiment. The maximum cross section corresponding to the two solutions is expected to be less than 0.79 nb at 90% confidence level and 122 +/- 10 nb at a center-of-mass energy of 5.26 GeV.

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关键词

Born approximation,Branching fraction,Electron–positron annihilation,Amplitude,Pi,Nuclear physics,Physics

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