在2.00 - 3.08 GeV能量区域通过\(e^{+}e^{-}\to p\overline{p}\)测量质子电磁形状因子

Measurement of Proton Electromagnetic Form Factors in e^{+}e^{-}→pp[over ¯] in the Energy Region 2.00-3.08 GeV.

作者信息

Ablikim M, Achasov M N, Adlarson P, Ahmed S, Albrecht M, Alekseev M, Amoroso A, An F F, An Q, Bai Y, Bakina O, Baldini Ferroli R, Balossino I, Ban Y, Begzsuren K, Bennett J V, Berger N, Bertani M, Bettoni D, Bianchi F, Biernat J, Bloms J, Boyko I, Briere R A, Cai H, Cai X, Calcaterra A, Cao G F, Cao N, Cetin S A, Chai J, Chang J F, Chang W L, Chelkov G, Chen D Y, Chen G, Chen H S, Chen J, Chen M L, Chen S J, Chen X R, Chen Y B, Cheng W, Cibinetto G, Cossio F, Cui X F, Dai H L, Dai J P, Dai X C, Dbeyssi A, Dedovich D, Deng Z Y, Denig A, Denysenko I, Destefanis M, De Mori F, Ding Y, Dong C, Dong J, Dong L Y, Dong M Y, Du S X, Fang J, Fang S S, Fang Y, Farinelli R, Fava L, Feldbauer F, Felici G, Feng C Q, Fritsch M, Fu C D, Fu Y, Gao Q, Gao Y, Gao Y, Gao Y G, Garillon B, Garzia I, Gersabeck E M, Gilman A, Goetzen K, Gong L, Gong W X, Gradl W, Greco M, Gu L M, Gu M H, Gu S, Gu Y T, Guan C Y, Guo A Q, Guo L B, Guo R P, Guo Y P, Guskov A, Han S, Han T Z, Hao X Q, Harris F A, He K L, Heinsius F H, Held T, Heng Y K, Himmelreich M, Hou Y R, Hou Z L, Hu H M, Hu J F, Hu T, Hu Y, Huang G S, Huang J S, Huang L Q, Huang X T, Huesken N, Hussain T, Ikegami Andersson W, Imoehl W, Irshad M, Ji Q, Ji Q P, Ji X B, Ji X L, Jiang H L, Jiang X S, Jiang X Y, Jiao J B, Jiao Z, Jin D P, Jin S, Jin Y, Johansson T, Kalantar-Nayestanaki N, Kang X S, Kappert R, Kavatsyuk M, Ke B C, Keshk I K, Khoukaz A, Kiese P, Kiuchi R, Kliemt R, Koch L, Kolcu O B, Kopf B, Kuemmel M, Kuessner M, Kupsc A, Kurth M, Kurth M G, Kühn W, Lange J S, Larin P, Lavezzi L, Leithoff H, Lenz T, Li C, Li C H, Li Cheng, Li D M, Li F, Li G, Li H B, Li H J, Li J C, Li Ke, Li L K, Li Lei, Li P L, Li P R, Li W D, Li W G, Li X H, Li X L, Li X N, Li Z B, Li Z Y, Liang H, Liang H, Liang Y F, Liang Y T, Liao L Z, Libby J, Lin C X, Lin D X, Liu B, Liu B J, Liu C X, Liu D, Liu D Y, Liu F H, Liu Fang, Liu Feng, Liu H B, Liu H M, Liu Huanhuan, Liu Huihui, Liu J B, Liu J Y, Liu K, Liu K Y, Liu Ke, Liu L, Liu L Y, Liu Q, Liu S B, Liu T, Liu X, Liu X Y, Liu Y B, Liu Z A, Liu Zhiqing, Long Y F, Lou X C, Lu H J, Lu J D, Lu J G, Lu X L, Lu Y, Lu Y P, Luo C L, Luo M X, Luo P W, Luo T, Luo X L, Lusso S, Lyu X R, Ma F C, Ma H L, Ma L L, Ma M M, Ma Q M, Ma R Q, Ma X N, Ma X X, Ma X Y, Ma Y M, Maas F E, Maggiora M, Maldaner S, Malde S, Malik Q A, Mangoni A, Mao Y J, Mao Z P, Marcello S, Meng Z X, Messchendorp J G, Mezzadri G, Min J, Min T J, Mitchell R E, Mo X H, Mo Y J, Morales Morales C, Muchnoi N Yu, Muramatsu H, Mustafa A, Nakhoul S, Nefedov Y, Nerling F, Nikolaev I B, Ning Z, Nisar S, Niu S L, Olsen S L, Ouyang Q, Pacetti S, Pan Y, Papenbrock M, Pathak A, Patteri P, Pelizaeus M, Peng H P, Peters K, Pettersson J, Ping J L, Ping R G, Pitka A, Poling R, Prasad V, Qi H, Qi M, Qian S, Qiao C F, Qin L Q, Qin X P, Qin X S, Qin Z H, Qiu J F, Qu S Q, Rashid K H, Ravindran K, Redmer C F, Richter M, Rivetti A, Rodin V, Rolo M, Rong G, Rosner Ch, Rump M, Sarantsev A, Savrié M, Schelhaas Y, Schoenning K, Shan W, Shan X Y, Shao M, Shen C P, Shen P X, Shen X Y, Sheng H Y, Shi H C, Shi R S, Shi X, Shi X D, Song J J, Song Q Q, Song X Y, Sosio S, Sowa C, Spataro S, Sui F F, Sun G X, Sun J F, Sun L, Sun S S, Sun T, Sun W Y, Sun X H, Sun Y J, Sun Y K, Sun Y Z, Sun Z J, Sun Z T, Tan Y T, Tang C J, Tang G Y, Tang X, Thoren V, Tsednee B, Uman I, Wang B, Wang B L, Wang C W, Wang D Y, Wang H P, Wang K, Wang L L, Wang L S, Wang M, Wang M Z, Wang Meng, Wang P L, Wang W P, Wang X, Wang X F, Wang X L, Wang Y D, Wang Y, Wang Y, Wang Y F, Wang Y Q, Wang Z, Wang Z G, Wang Z Y, Wang Z Y, Wang Zongyuan, Weber T, Wei D H, Weidenkaff P, Weidner F, Wen H W, Wen S P, Wiedner U, Wilkinson G, Wolke M, Wu J F, Wu L H, Wu L J, Wu Z, Xia L, Xia Y, Xiao S Y, Xiao Y J, Xiao Z J, Xie Y G, Xie Y H, Xing T Y, Xiong X A, Xiu Q L, Xu G F, Xu J J, Xu L, Xu Q J, Xu W, Xu X P, Yan F, Yan L, Yan W B, Yan W C, Yan Y H, Yang H J, Yang H X, Yang L, Yang R X, Yang S L, Yang Y H, Yang Y X, Yang Yifan, Yang Z Q, Yang Zhi, Ye M, Ye M H, Yin J H, You Z Y, Yu B X, Yu C X, Yu G, Yu J S, Yu T, Yuan C Z, Yuan X Q, Yuan Y, Yue C X, Yuncu A, Zafar A A, Zeng Y, Zhang B X, Zhang B Y, Zhang C C, Zhang D H, Zhang H H, Zhang H Y, Zhang J, Zhang J L, Zhang J Q, Zhang J W, Zhang J W, Zhang J Y, Zhang J Y, Zhang J Z, Zhang K, Zhang L, Zhang Lei, Zhang S F, Zhang T J, Zhang X Y, Zhang Y, Zhang Y H, Zhang Y T, Zhang Yang, Zhang Yao, Zhang Yi, Zhang Yu, Zhang Z H, Zhang Z P, Zhang Z Y, Zhao G, Zhao J, Zhao J W, Zhao J Y, Zhao J Z, Zhao Lei, Zhao Ling, Zhao M G, Zhao Q, Zhao S J, Zhao T C, Zhao Y B, Zhao Z G, Zhemchugov A, Zheng B, Zheng J P, Zheng Y, Zheng Y H, Zhong B, Zhong C, Zhou L, Zhou L P, Zhou Q, Zhou X, Zhou X K, Zhou X R, Zhou Xiaoyu, Zhou Xu, Zhu A N, Zhu J, Zhu J, Zhu K, Zhu K J, Zhu S H, Zhu W J, Zhu X L, Zhu Y C, Zhu Y S, Zhu Z A, Zhuang J, Zou B S, Zou J H

机构信息

Institute of High Energy Physics, Beijing 100049, People's Republic of China.

G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.

出版信息

Phys Rev Lett. 2020 Jan 31;124(4):042001. doi: 10.1103/PhysRevLett.124.042001.

DOI:10.1103/PhysRevLett.124.042001

PMID:32058790

Abstract

The process of e^{+}e^{-}→pp[over ¯] is studied at 22 center-of-mass energy points (sqrt[s]) from 2.00 to 3.08 GeV, exploiting 688.5 pb^{-1} of data collected with the BESIII detector operating at the BEPCII collider. The Born cross section (σ_{pp[over ¯]}) of e^{+}e^{-}→pp[over ¯] is measured with the energy-scan technique and it is found to be consistent with previously published data, but with much improved accuracy. In addition, the electromagnetic form-factor ratio (|G_{E}/G_{M}|) and the value of the effective (|G_{eff}|), electric (|G_{E}|), and magnetic (|G_{M}|) form factors are measured by studying the helicity angle of the proton at 16 center-of-mass energy points. |G_{E}/G_{M}| and |G_{M}| are determined with high accuracy, providing uncertainties comparable to data in the spacelike region, and |G_{E}| is measured for the first time. We reach unprecedented accuracy, and precision results in the timelike region provide information to improve our understanding of the proton inner structure and to test theoretical models which depend on nonperturbative quantum chromodynamics.

摘要