在\(e^{+}e^{-}\to K^{+}(D_{s}^{-}D^{*0}+D_{s}^{*-}D^{0})\)过程中\(K^{+}\)反冲质量谱中近阈结构的观测
Observation of a Near-Threshold Structure in the K^{+} Recoil-Mass Spectra in e^{+}e^{-}→K^{+}(D_{s}^{-}D^{*0}+D_{s}^{*-}D^{0}).
作者信息
Ablikim M, Achasov M N, Adlarson P, Ahmed S, Albrecht M, Aliberti R, Amoroso A, An Q, Bai X H, Bai Y, Bakina O, Baldini Ferroli R, Balossino I, Ban Y, Begzsuren K, Berger N, Bertani M, Bettoni D, Bianchi F, Biernat J, Bloms J, Bortone A, Boyko I, Briere R A, Cai H, Cai X, Calcaterra A, Cao G F, Cao N, Cetin S A, Chang J F, Chang W L, Chelkov G, Chen D Y, Chen G, Chen H S, Chen M L, Chen S J, Chen X R, Chen Y B, Chen Z J, Cheng W S, Cibinetto G, Cossio F, Cui X F, Dai H L, Dai X C, Dbeyssi A, de Boer R B, Dedovich D, Deng Z Y, Denig A, Denysenko I, Destefanis M, De Mori F, Ding Y, Dong C, Dong J, Dong L Y, Dong M Y, Dong X, Du S X, Fang J, Fang S S, Fang Y, Farinelli R, Fava L, Feldbauer F, Felici G, Feng C Q, Fritsch M, Fu C D, Fu Y, Gao Y, Gao Y, Gao Y, Gao Y G, Garzia I, Gersabeck E M, Gilman A, Goetzen K, Gong L, Gong W X, Gradl W, Greco M, Gu L M, Gu M H, Gu S, Gu Y T, Guan C Y, Guo A Q, Guo L B, Guo R P, Guo Y P, Guo Y P, Guskov A, Han T T, Hao X Q, Harris F A, He K L, Heinsius F H, Heinz C H, Held T, Heng Y K, Herold C, Himmelreich M, Holtmann T, Hou Y R, Hou Z L, Hu H M, Hu J F, Hu T, Hu Y, Huang G S, Huang L Q, Huang X T, Huang Y P, Huang Z, Huesken N, Hussain T, Ikegami Andersson W, Imoehl W, Irshad M, Jaeger S, Janchiv S, Ji Q, Ji Q P, Ji X B, Ji X L, Jiang H B, Jiang X S, Jiang X Y, Jiang Y, Jiao J B, Jiao Z, Jin S, Jin Y, Johansson T, Kalantar-Nayestanaki N, Kang X S, Kappert R, Kavatsyuk M, Ke B C, Keshk I K, Khoukaz A, Kiese P, Kiuchi R, Kliemt R, Koch L, Kolcu O B, Kopf B, Kuemmel M, Kuessner M, Kupsc A, Kurth M G, Kühn W, Lane J J, Lange J S, Larin P, Lavezzi L, Lei Z H, Leithoff H, Lellmann M, Lenz T, Li C, Li C H, Li Cheng, Li D M, Li F, Li G, Li H, Li H, Li H B, Li H J, Li J L, Li J Q, Li Ke, Li L K, Li Lei, Li P L, Li P R, Li S Y, Li W D, Li W G, Li X H, Li X L, Li Z Y, Liang H, Liang H, Liang Y F, Liang Y T, Liao L Z, Libby J, Lin C X, Liu B J, Liu C X, Liu D, 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, Liu K Y, Liu Ke, Liu L, Liu M H, Liu Q, Liu S B, Liu Shuai, Liu T, Liu W M, Liu X, Liu Y, Liu Y B, Liu Z A, Liu Z Q, Lou X C, Lu F X, Lu H J, Lu J D, Lu J G, Lu X L, Lu Y, Lu Y P, Luo C L, Luo M X, Luo P W, Luo T, Luo X L, Lusso S, Lyu X R, Ma F C, Ma H L, Ma L L, Ma M M, Ma Q M, Ma R Q, Ma R T, Ma X N, Ma X X, Ma X Y, Maas F E, Maggiora M, Maldaner S, Malde S, Malik Q A, Mangoni A, Mao Y J, Mao Z P, Marcello S, Meng Z X, Messchendorp J G, Mezzadri G, Min T J, Mitchell R E, Mo X H, Mo Y J, Muchnoi N Yu, Muramatsu H, Nakhoul S, Nefedov Y, Nerling F, Nikolaev I B, Ning Z, Nisar S, Olsen S L, Ouyang Q, Pacetti S, Pan X, Pan Y, Pathak A, Patteri P, Pelizaeus M, Peng H P, Peters K, Pettersson J, Ping J L, Ping R G, Pitka A, Poling R, Prasad V, Qi H, Qi H R, Qi K H, Qi M, Qi T Y, Qi T Y, Qian S, Qian W B, Qian Z, Qiao C F, Qin L Q, Qin X S, Qin Z H, Qiu J F, Qu S Q, Rashid K H, Ravindran K, Redmer C F, Rivetti A, Rodin V, Rolo M, Rong G, Rosner Ch, Rump M, Sang H S, Sarantsev A, Schelhaas Y, Schnier C, Schoenning K, Scodeggio M, Shan D C, Shan W, Shan X Y, Shao M, Shen C P, Shen P X, Shen X Y, Shi B A, Shi H C, Shi R S, Shi X, Shi X D, Song W M, Song Y X, Sosio S, Spataro S, Su K X, Sui F F, Sun G X, Sun H K, Sun J F, Sun L, Sun S S, Sun T, Sun W Y, Sun X, Sun Y J, Sun Y K, Sun Y Z, Sun Z T, Tan Y H, Tan Y X, Tang C J, Tang G Y, Tang J, Teng J X, Thoren V, Uman I, Wang C W, Wang D Y, Wang H J, Wang H P, Wang K, Wang L L, Wang M, Wang M Z, Wang Meng, Wang W H, Wang W P, Wang X, Wang X F, Wang X L, Wang Y, Wang Y, Wang Y D, Wang Y F, Wang Y Q, Wang Z, Wang Z Y, Wang Ziyi, Wang Zongyuan, Wei D H, Weidenkaff P, Weidner F, Wen S P, White D J, Wiedner U, Wilkinson G, Wolke M, Wollenberg L, Wu J F, Wu L H, Wu L J, Wu X, Wu Z, Xia L, Xiao H, Xiao S Y, Xiao Y J, Xiao Z J, Xie X H, Xie Y G, Xie Y H, Xing T Y, Xu G F, Xu J J, Xu Q J, Xu W, Xu X P, Xu Y C, Yan F, Yan L, Yan L, Yan W B, Yan W C, Yan Xu, Yang H J, Yang H X, Yang L, Yang R X, Yang S L, Yang S L, Yang Y H, Yang Y X, Yang Yifan, Yang Zhi, Ye M, Ye M H, Yin J H, You Z Y, Yu B X, Yu C X, Yu G, Yu J S, Yu T, Yuan C Z, Yuan L, Yuan W, Yuan X Q, Yuan Y, Yuan Z Y, Yue C X, Yuncu A, Zafar A A, Zeng Y, Zhang B X, Zhang Guangyi, Zhang H, Zhang H H, Zhang H Y, Zhang J J, Zhang J L, Zhang J Q, Zhang J W, Zhang J Y, Zhang J Z, Zhang Jianyu, Zhang Jiawei, Zhang Lei, Zhang S, Zhang S F, Zhang Shulei, Zhang X D, Zhang X Y, Zhang Y, Zhang Y H, Zhang Y T, Zhang Yan, Zhang Yao, Zhang Yi, Zhang Z H, Zhang Z Y, Zhao G, Zhao J, Zhao J Y, Zhao J Z, Zhao Lei, Zhao Ling, Zhao M G, Zhao Q, Zhao S J, Zhao Y B, Zhao Y X, Zhao Z G, Zhemchugov A, Zheng B, Zheng J P, Zheng Y, Zheng Y H, Zhong B, Zhong C, Zhou L P, Zhou Q, Zhou X, Zhou X K, Zhou X R, Zhu A N, Zhu J, Zhu K, Zhu K J, Zhu S H, Zhu T J, Zhu W J, Zhu X L, Zhu Y C, Zhu Z A, Zou B S, Zou J H
机构信息
Institute of High Energy Physics, Beijing 100049, People's Republic of China.
G.I. Budker Institute of Nuclear Physics SB RAS (BINP), Novosibirsk 630090, Russia.
出版信息
Phys Rev Lett. 2021 Mar 12;126(10):102001. doi: 10.1103/PhysRevLett.126.102001.
We report a study of the processes of e^{+}e^{-}→K^{+}D_{s}^{-}D^{0} and K^{+}D_{s}^{-}D^{0} based on e^{+}e^{-} annihilation samples collected with the BESIII detector operating at BEPCII at five center-of-mass energies ranging from 4.628 to 4.698 GeV with a total integrated luminosity of 3.7 fb^{-1}. An excess of events over the known contributions of the conventional charmed mesons is observed near the D_{s}^{-}D^{0} and D_{s}^{-}D^{0} mass thresholds in the K^{+} recoil-mass spectrum for events collected at sqrt[s]=4.681 GeV. The structure matches a mass-dependent-width Breit-Wigner line shape, whose pole mass and width are determined as (3982.5_{-2.6}^{+1.8}±2.1) MeV/c^{2} and (12.8_{-4.4}^{+5.3}±3.0) MeV, respectively. The first uncertainties are statistical and the second are systematic. The significance of the resonance hypothesis is estimated to be 5.3 σ over the contributions only from the conventional charmed mesons. This is the first candidate for a charged hidden-charm tetraquark with strangeness, decaying into D_{s}^{-}D^{0} and D_{s}^{-}D^{0}. However, the properties of the excess need further exploration with more statistics.
我们报告了一项基于在北京正负电子对撞机（BEPCII）上运行的北京谱仪III（BESIII）探测器收集的正负电子湮灭样本，对(e^{+}e^{-}\to K^{+}D_{s}^{-}D^{0})和(K^{+}D_{s}^{-}D^{0})过程的研究。该样本在五个质心能量范围从4.628到4.698 GeV下收集，总积分亮度为3.7 fb⁻¹。在(\sqrt{s}=4.681) GeV收集的事件的(K^{+})反冲质量谱中，在(D_{s}^{-}D^{0})和(D_{s}^{-}D^{0})质量阈值附近，观察到超过传统粲介子已知贡献的事件过剩。该结构符合质量依赖宽度的布雷特-维格纳线形，其极点质量和宽度分别确定为((3982.5_{-2.6}^{+1.8}±2.1)) MeV/c²和((12.8_{-4.4}^{+5.3}±3.0)) MeV。第一个不确定度是统计性的，第二个是系统性的。共振假设的显著性估计在仅来自传统粲介子的贡献之上为5.3 σ。这是第一个具有奇异数的带电隐藏粲四夸克候选者，衰变为(D_{s}^{-}D^{0})和(D_{s}^{-}D^{0})。然而，过剩部分的性质需要用更多统计数据进一步探索。
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