Observation of a Vector Charmoniumlike State at 4.7 GeV/c^{2} and Search for Z_{cs} in e^{+}e^{-}→K^{+}K^{-}J/ψ.
M Ablikim,M N Achasov,P Adlarson,O Afedulidis,X C Ai,R Aliberti,A Amoroso,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,W L Chang,G R Che,G Chelkov,C Chen,C H 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,Z Y Chen,S K Choi,X Chu,G Cibinetto,F Cossio,J J Cui,H L Dai,J P Dai,A Dbeyssi,R E de Boer,D Dedovich,C Q Deng,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,J Fang,S S Fang,W X Fang,Y Fang,Y Q Fang,R Farinelli,L Fava,F Feldbauer,G Felici,C Q Feng,J H Feng,Y T 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 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Li,T Li,W D Li,W G Li,X Li,X H Li,X L Li,Xiaoyu Li,Y G Li,Z J Li,Z X Li,C 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 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,X Liu,Y Liu,Y Liu,Y B Liu,Z A Liu,Z D 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,X T Ma,X Y Ma,Y Ma,Y M Ma,F E Maas,M Maggiora,S Malde,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,B Moses,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 S Qin,Z H Qin,J F Qiu,S Q Qu,Z H 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,S Y 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 Q Sun,Z T Sun,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,Y Tian,Z F Tian,I Uman,Y Wan,S J Wang,B Wang,B L Wang,Bo Wang,D Y Wang,F Wang,H J Wang,J P Wang,K Wang,L L Wang,M Wang,Meng Wang,N Y 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,X N Wang,Y Wang,Y D Wang,Y F Wang,Y L Wang,Y N Wang,Y Q Wang,Yaqian Wang,Yi Wang,Z Wang,Z L Wang,Z Y 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Physical review letters（2023）
引用0|浏览15
暂无评分
摘要
Using data samples with an integrated luminosity of 5.85 fb^{-1} collected at center-of-mass energies from 4.61 to 4.95 GeV with the BESIII detector operating at the BEPCII storage ring, we measure the cross section for the process e^{+}e^{-}→K^{+}K^{-}J/ψ. A new resonance with a mass of M=4708_{-15}^{+17}±21 MeV/c^{2} and a width of Γ=126_{-23}^{+27}±30 MeV is observed in the energy-dependent line shape of the e^{+}e^{-}→K^{+}K^{-}J/ψ cross section with a significance over 5σ. The K^{+}J/ψ system is also investigated to search for charged charmoniumlike states, but no significant Z_{cs}^{+} states are observed. Upper limits on the Born cross sections for e^{+}e^{-}→K^{-}Z_{cs}(3985)^{+}/K^{-}Z_{cs}(4000)^{+}+c.c. with Z_{cs}(3985)^{±}/Z_{cs}(4000)^{±}→K^{±}J/ψ are reported at 90% confidence levels. The ratio of branching fractions {[B(Z_{cs}(3985)^{+}→K^{+}J/ψ)]/B[Z_{cs}(3985)^{+}→(D[over ¯]^{0}D_{s}^{*+}+D[over ¯]^{*0}D_{s}^{+})]} is measured to be less than 0.03 at 90% confidence level.
