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 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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)
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.
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