Study of e^{+}e^{-}→γωJ/ψ and Observation of X(3872)→ωJ/ψ.

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

PHYSICAL REVIEW LETTERS（2019）

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摘要

We study the e(+)e(-) -> gamma omega J/psi process using 11.6 fb(-1) e(+)e(-) annihilation data taken at center-of-mass energies from root s = 4.008 GeV to 4.600 GeV with the BESIII detector at the BEPCII storage ring. The X(3872) resonance is observed for the first time in the omega J/psi system with a significance of more than 5 sigma. The relative decay ratio of X(3872) -> omega J/psi and pi(+)pi(-)J/psi is measured to be R = 1.6(-0.3)(+0.4) +/- 0.2, where the first uncertainty is statistical and the second systematic (the same hereafter). The root s-dependent cross section of e(+)e(-) -> gamma X(3872) is also measured and investigated, and it can be described by a single Breit- Wigner resonance, referred to as the Y(4200), with a mass of 4200.6(-13.3)(+7.9) +/- 3.0 MeV/c(2) and a width of 115(-26)(+38) +/- 12 MeV. In addition, to describe the omega J/psi mass distribution above 3.9 GeV/c(2), we need at least one additional Breit-Wigner resonance, labeled as X(3915), in the fit. The mass and width of the X(3915) are determined. The resonant parameters of the X(3915) agree with those of the Y(3940) in B -> K omega J/psi and of the X(3915) in gamma gamma -> omega J/psi observed by the Belle and BABAR experiments within errors.

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关键词

Electron–positron annihilation,X(3872),Resonance,Annihilation,Mass distribution,Atomic physics,Storage ring,Physics,Cross section (physics)

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