Observation of Structures in the Processes e^{+}e^{-}→ωχ_{c1} and ωχ_{c2}.
M Ablikim,M N Achasov,P Adlarson,X C Ai,R Aliberti,A Amoroso,M R An,Q An,Y Bai,O Bakina,I Balossino,Y Ban,H-R Bao,V Batozskaya,K Begzsuren,N Berger,M Berlowski,M Bertani,D Bettoni,F Bianchi,E Bianco,A Bortone,I Boyko,R A Briere,A Brueggemann,H Cai,X Cai,A Calcaterra,G F Cao,N Cao,S A Cetin,J F Chang,T T Chang,W L Chang,G R Che,G Chelkov,C Chen,Chao Chen,G Chen,H S Chen,M L Chen,S J Chen,S L Chen,S M Chen,T Chen,X R Chen,X T Chen,Y B Chen,Y Q Chen,Z J Chen,W S Cheng,S K Choi,X Chu,G Cibinetto,S C Coen,F Cossio,J J Cui,H L Dai,J P Dai,A Dbeyssi,R E de Boer,D Dedovich,Z Y Deng,A Denig,I Denysenko,M Destefanis,F De Mori,B Ding,X X Ding,Y Ding,Y Ding,J Dong,L Y Dong,M Y Dong,X Dong,M C Du,S X Du,Z H Duan,P Egorov,Y H Fan,J Fang,S S Fang,W X Fang,Y Fang,R Farinelli,L Fava,F Feldbauer,G Felici,C Q Feng,J H Feng,K Fischer,M Fritsch,C D Fu,J L Fu,Y W Fu,H Gao,Y N Gao,Yang Gao,S Garbolino,I Garzia,P T Ge,Z W Ge,C Geng,E M Gersabeck,A Gilman,K Goetzen,L Gong,W X Gong,W Gradl,S Gramigna,M Greco,M H Gu,Y T Gu,C Y Guan,Z L Guan,A Q Guo,L B Guo,M J Guo,R P Guo,Y P Guo,A Guskov,T T Han,W Y Han,X Q Hao,F A Harris,K K He,K L He,F H H Heinsius,C H Heinz,Y K Heng,C Herold,T Holtmann,P C Hong,G Y Hou,X T Hou,Y R Hou,Z L Hou,H M Hu,J F Hu,T Hu,Y Hu,G S Huang,K X Huang,L Q Huang,X T Huang,Y P Huang,T Hussain,N Hüsken,N In der Wiesche,M Irshad,J Jackson,S Jaeger,S Janchiv,J H Jeong,Q Ji,Q P Ji,X B Ji,X L Ji,Y Y Ji,X Q Jia,Z K Jia,H J Jiang,P C Jiang,S S Jiang,T J Jiang,X S Jiang,Y Jiang,J B Jiao,Z Jiao,S Jin,Y Jin,M Q Jing,X M Jing,T Johansson,X K,S Kabana,N Kalantar-Nayestanaki,X L Kang,X S Kang,M Kavatsyuk,B C Ke,A Khoukaz,R Kiuchi,R Kliemt,O B Kolcu,B Kopf,M Kuessner,A Kupsc,W Kühn,J J Lane,P Larin,A Lavania,L Lavezzi,T T Lei,Z H Lei,H Leithoff,M Lellmann,T Lenz,C Li,C Li,C H Li,Cheng Li,D M Li,F Li,G Li,H Li,H B Li,H J Li,H N Li,Hui Li,J R Li,J S Li,J W Li,K L Li,Ke Li,L J Li,L K Li,Lei Li,M H Li,P R Li,Q X Li,S X Li,T Li,W D Li,W G Li,X H Li,X L Li,Xiaoyu Li,Y G Li,Z J Li,Z X Li,C Liang,H Liang,H Liang,H Liang,Y F Liang,Y T Liang,G R Liao,L Z Liao,Y P Liao,J Libby,A Limphirat,D X Lin,T Lin,B J Liu,B X Liu,C Liu,C X Liu,F H Liu,Fang Liu,Feng Liu,G M Liu,H Liu,H B Liu,H M Liu,Huanhuan Liu,Huihui Liu,J B Liu,J L Liu,J Y Liu,K Liu,K Y Liu,Ke Liu,L Liu,L C Liu,Lu Liu,M H Liu,P L Liu,Q Liu,S B Liu,T Liu,W K Liu,W M Liu,X Liu,Y Liu,Y Liu,Y B Liu,Z A Liu,Z Q Liu,X C Lou,F X Lu,H J Lu,J G Lu,X L Lu,Y Lu,Y P Lu,Z H Lu,C L Luo,M X Luo,T Luo,X L Luo,X R Lyu,Y F Lyu,F C Ma,H Ma,H L Ma,J L Ma,L L Ma,M M Ma,Q M Ma,R Q Ma,R T Ma,X Y Ma,Y Ma,Y M Ma,F E Maas,M Maggiora,S Malde,Q A Malik,A Mangoni,Y J Mao,Z P Mao,S Marcello,Z X Meng,J G Messchendorp,G Mezzadri,H Miao,T J Min,R E Mitchell,X H Mo,N Yu Muchnoi,J Muskalla,Y Nefedov,F Nerling,I B Nikolaev,Z Ning,S Nisar,Q L Niu,W D Niu,Y Niu,S L Olsen,Q Ouyang,S Pacetti,X Pan,Y Pan,A Pathak,P Patteri,Y P Pei,M Pelizaeus,H P Peng,Y Y Peng,K Peters,J L Ping,R G Ping,S Plura,V Prasad,F Z Qi,H Qi,H R Qi,M Qi,T Y Qi,S Qian,W B Qian,C F Qiao,J J Qin,L Q Qin,X P Qin,X S Qin,Z H Qin,J F Qiu,S Q Qu,C F Redmer,K J Ren,A Rivetti,M Rolo,G Rong,Ch Rosner,S N Ruan,N Salone,A Sarantsev,Y Schelhaas,K Schoenning,M Scodeggio,K Y Shan,W Shan,X Y Shan,J F Shangguan,L G Shao,M Shao,C P Shen,H F Shen,W H Shen,X Y Shen,B A Shi,H C Shi,J L Shi,J Y Shi,Q Q Shi,R S Shi,X Shi,J J Song,T Z Song,W M Song,Y J Song,Y X Song,S Sosio,S Spataro,F Stieler,Y J Su,G B Sun,G X Sun,H Sun,H K Sun,J F Sun,K Sun,L Sun,S S Sun,T Sun,W Y Sun,Y Sun,Y J Sun,Y Z Sun,Z T Sun,Y X Tan,C J Tang,G Y Tang,J Tang,Y A Tang,L Y Tao,Q T Tao,M Tat,J X Teng,V Thoren,W H Tian,W H Tian,Y Tian,Z F Tian,I Uman,S J Wang,B Wang,B L Wang,Bo Wang,C W Wang,D Y Wang,F Wang,H J Wang,H P Wang,J P Wang,K Wang,L L Wang,M Wang,Meng Wang,S Wang,S Wang,T Wang,T J Wang,W Wang,W Wang,W P Wang,X Wang,X F Wang,X J Wang,X L Wang,Y Wang,Y D Wang,Y F Wang,Y H Wang,Y N Wang,Y Q Wang,Yaqian Wang,Yi Wang,Z Wang,Z L Wang,Z Y Wang,Ziyi Wang,D Wei,D H Wei,F Weidner,S P Wen,C W Wenzel,U Wiedner,G Wilkinson,M Wolke,L Wollenberg,C Wu,J F Wu,L H Wu,L J Wu,X Wu,X H Wu,Y Wu,Y H Wu,Y J Wu,Z Wu,L Xia,X M Xian,T Xiang,D Xiao,G Y Xiao,S Y Xiao,Y L Xiao,Z J Xiao,C Xie,X H Xie,Y Xie,Y G Xie,Y H Xie,Z P Xie,T Y Xing,C F Xu,C J Xu,G F Xu,H Y Xu,Q J Xu,Q N Xu,W Xu,W L Xu,X P Xu,Y C Xu,Z P Xu,Z S Xu,F Yan,L Yan,W B Yan,W C Yan,X Q Yan,H J Yang,H L Yang,H X Yang,Tao Yang,Y Yang,Y F Yang,Y X Yang,Yifan Yang,Z W Yang,Z P Yao,M Ye,M H Ye,J H Yin,Z Y You,B X Yu,C X Yu,G Yu,J S Yu,T Yu,X D Yu,C Z Yuan,L Yuan,S C Yuan,X Q Yuan,Y Yuan,Z Y Yuan,C X Yue,A A Zafar,F R Zeng,X Zeng,Y Zeng,Y J Zeng,X Y Zhai,Y C Zhai,Y H Zhan,A Q Zhang,B L Zhang,B X Zhang,D H Zhang,G Y Zhang,H Zhang,H C Zhang,H H Zhang,H H Zhang,H Q Zhang,H Y Zhang,J Zhang,J J Zhang,J L Zhang,J Q Zhang,J W Zhang,J X Zhang,J Y Zhang,J Z Zhang,Jianyu Zhang,Jiawei Zhang,L M Zhang,L Q Zhang,Lei Zhang,P Zhang,Q Y Zhang,Shuihan Zhang,Shulei Zhang,X D Zhang,X M Zhang,X Y Zhang,Xuyan Zhang,Y Zhang,Y Zhang,Y T Zhang,Y H Zhang,Yan Zhang,Yao Zhang,Z H Zhang,Z L Zhang,Z Y Zhang,Z Y Zhang,G Zhao,J Zhao,J Y Zhao,J Z Zhao,Lei Zhao,Ling Zhao,M G Zhao,R P Zhao,S J Zhao,Y B Zhao,Y X Zhao,Z G Zhao,A Zhemchugov,B Zheng,J P Zheng,W J Zheng,Y H Zheng,B Zhong,X Zhong,H Zhou,L P Zhou,X Zhou,X K Zhou,X R Zhou,X Y Zhou,Y Z Zhou,J Zhu,K Zhu,K J Zhu,L Zhu,L X Zhu,S H Zhu,S Q Zhu,T J Zhu,W J Zhu,Y C Zhu,Z A Zhu,J H Zou,J Zu,BESIII Collaboration
Physical review letters（2024）
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摘要
We present measurements of the Born cross sections for the processes e^{+}e^{-}→ωχ_{c1} and ωχ_{c2} at center-of-mass energies sqrt[s] from 4.308 to 4.951 GeV. The measurements are performed with data samples corresponding to an integrated luminosity of 11.0 fb^{-1} collected with the BESIII detector operating at the Beijing Electron Positron Collider storage ring. Assuming the e^{+}e^{-}→ωχ_{c2} signals come from a single resonance, the mass and width are determined to be M=(4413.6±9.0±0.8) MeV/c^{2} and Γ=(110.5±15.0±2.9) MeV, respectively, which is consistent with the parameters of the well-established resonance ψ(4415). In addition, we also use one single resonance to describe the e^{+}e^{-}→ωχ_{c1} line shape and determine the mass and width to be M=(4544.2±18.7±1.7) MeV/c^{2} and Γ=(116.1±33.5±1.7) MeV, respectively. The structure of this line shape, observed for the first time, requires further understanding.
