Observation of a charged charmoniumlike structure in e+ e- → (D* D*)± π∓ at √s = 4.26 GeV.

M Ablikim,M Kornicer,S Jin,Ling Zhao,T Luo,T Hu,H Ye,K Liu,M Qi,Y Huang,M Werner,M He,D Wang,M Bertani,P Wang,G Chen,Z Xue,D Cronin-Hennessy,Q An,O Fuks,A Calcaterra,D Toth,Cui Li,Lei Li,H Loehner,B Spruck,Y Yuan,O Albayrak,B Zheng,M Shao,L Yan,M Destefanis,M Greco,Y Gao,Z Jiao,X Liu,A Zhemchugov,C Geng,S Braun,L Fava,A Zallo,B Kopf,U Wiedner,K Wang,Y Ban,A Denig,M Ye,B Kloss,S Spataro,K Peters,Zhiqing Liu,B Zhong,W Gradl,P Larin,Cheng Li,Fang Liu,E Prencipe,Y Ding,J Fang,H Cai,W Kuehn,G Li,I Denysenko,H Muramatsu,M Maggiora,F Li,Y Nefedov,T Hussain,R Poling,S Ma,X Tang,K Zhu,Q Zhao,Z Wang,M Pelizaeus,S Pacetti,V Bytev,M Lv,C Morales Morales,E Boger,J Min,K Goetzen,C Zhang,R Zhang,B Wang,Q Ouyang,H Liu,K Moriya,A Sarantsev,J Zhuang,R Baldini Ferroli,M Wang,I Uman,O Bondarenko,I Tapan,K Li,M Ullrich,Feng Liu,Y Zeng,Z Ning,J Becker,W Lai,M Kavatsyuk,Q Liu,P Friedel,P Weidenkaff,M Leyhe,T Held,Q Ji,H Moeini,G Rong,W Wu,M Lara,W B Yan ,E H Thorndike ,R A Briere ,L.s Wang ,G A Chelkov ,C D Fu ,S.g Wang ,H M Hu ,Zhou Li ,Y H Yan ,Q.j Li ,B.y Zhang ,H.m Liu ,Z J Sun ,J M Bian ,Y.f Wang ,F F An ,S J Qian ,X L Ji ,H.b Liu ,Y L Han ,C L Luo ,X P Xu ,X Y Song ,S H Zhu ,X.l Li ,J L Ping ,Y P Chu ,Han Liu ,Z.b Li ,D.h Zhang ,H W Yu ,O Çakır ,M X Luo ,L.d Liu ,Lili Zhang ,H P Cheng ,C Q Feng ,J S Lange ,D Ambrose ,H.b Li ,G R Lu ,Y.s Zhu ,Y B Zhao ,J.w Zhang ,Q J Xu ,B X Yu ,C J Tang ,X L Luo ,X T Huang ,H Peng ,X B Ji ,Tingting Guo ,Liang-Liang Wang ,Nengyou Wu ,Z L Hou ,C.x Liu ,B.j Liu ,Z T Sun ,Q A Malik ,S L Olsen ,Yao Qin ,G R Liao ,X D Ruan ,X Zhao ,X.l Wang ,T J Min ,Y H Guan ,J.p Liu ,Y K Heng ,D H Wei ,J V Bennett ,F Jing ,C.h Li ,G X Sun ,X K Zhou ,S L Zang ,Hu Chen ,X.n Li ,A Q Guo ,W.g Li ,Z.y Zhang ,Z H Qin ,Z P Mao ,G F Cao ,J H Zou ,L Q Huang ,H.h Zhang ,J F Chang ,X Zhu ,Lü Xiao-Fu ,X Lou ,Z.g Wang ,N Kalantar‐Nayestanaki ,H.s Chen ,J W Zhao ,J.c Li ,F E Maas ,Z.y Wang ,Y P Lu ,Tao Ma ,G F Xu ,S A Çetin ,C F Qiao ,Z.a Liu ,N Yu Muchnoi ,G Varner ,D P Jin ,H.l Ma ,Q.j Wang ,F.h Liu ,C Z Yuan ,Y T Gu ,Y Xie ,Yifan Yang ,S X Du ,М Н Ачасов ,Zhi Wang ,H Y Sheng ,K L He ,M.h Ye ,H S Zhao ,H J Lü ,J P Dai ,K.y Liu ,M G Zhao ,Y P Guo ,P.r Li ,Y T Liang ,D X Lin ,Y Xia ,Z Y Deng ,D H Sun ,Y F Liang ,C X Yu ,B.x Zhang ,Y.h Zhang ,X R Zhou ,Dong Liu ,P.l Liu ,H.w Liu ,X S Qin ,H L Dai ,J Fu ,J F Sun ,X H Mo ,Xiang Zhou ,I R Boyko ,G S Huang ,F A Harris ,Xiaoyan Ma ,G M Huang ,X.q Li ,W M Song ,X.j Zhang ,B S Zou ,D V Dedovich ,D.m Li ,Y Z Sun ,Qin Liu ,Y.b Liu ,Y J Sun ,Y.b Chen ,Q G Wen ,M H Gu ,H X Yang ,J.w Park ,M Y Dong ,J Hu ,I B Nikolaev ,Q L Xiu ,X.r Li ,Zhao Liu ,J G Messchendorp ,R G Ping ,C S Ji ,D.y Wang ,M R Shepherd ,Chenzheng Zhu ,J G Lü ,Zhenghao Zhang ,J Z Bai ,X.f Wang ,Y Zheng ,H.h Liu ,X.r Chen ,R E Mitchell ,S S Fang ,Shiqi Yu ,W M Ding ,L B Guo ,J.c Chen ,Z J Xiao ,C.c Zhang ,L Xia ,Xinxia Cai ,Z Zhao ,J B Jiao ,S X Wu ,J S Huang ,T C Zhao ,J F Qiu ,Y.q Wang ,X Y Shen ,S P Wen ,J S Yu ,X S Jiang ,X.y Zhang ,Y Zhu ,Gang Zhao ,Xu Zhao-Yu ,C P Shen ,Q M Ma ,P.l Wang ,F.c Ma ,W.d Li ,C F Redmer ,X T Liao ,L H Wu ,Y Mao ,S.b Liu ,M.l Chen ,J B Wei ,A A Zafar ,Y.d Wang ,H.y Zhang ,K H Rashid ,S.j Chen ,Z Y He ,W X Gong ,J P Zheng ,S J Zhao ,Z A Zhu ,C.l Liu ,S S Sun ,S.h Zhang ,Z.p Zhang ,L L Jiang ,Q N Xu

doi:10.1103/physrevlett.112.132001

Observation of a charged charmoniumlike structure in e+ e- → (D* D*)± π∓ at √s = 4.26 GeV.

M Ablikim, M Kornicer + Show 350 more

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https://doi.org/10.1103/physrevlett.112.132001

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#Beijing Electron Positron Collider #Recoil Mass Spectrum + Show 8 more

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Abstract

We study the process e+ e- →(D* D*)± π∓ at a center-of-mass energy of 4.26 GeV using a 827 pb(-1) data sample obtained with the BESIII detector at the Beijing Electron Positron Collider. Based on a partial reconstruction technique, the Born cross section is measured to be (137±9±15) pb. We observe a structure near the (D* D*)± threshold in the π∓ recoil mass spectrum, which we denote as the Zc±(4025). The measured mass and width of the structure are (4026.3±2.6±3.7) MeV/c2 and (24.8±5.6±7.7) MeV, respectively. Its production ratio σ(e+ e- → Zc±(4025)π∓ → (D* D*)± π∓)/σ(e+ e- → (D* D*)± π∓) is determined to be 0.65±0.09±0.06. The first uncertainties are statistical and the second are systematic.

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