在\(e^{+}e^{-}\to\pi^{+}\pi^{-}\psi_{2}(3823)\)中对共振结构的观测以及\(\psi_{2}(3823)\)的质量测量
Observation of Resonance Structures in e^{+}e^{-}→π^{+}π^{-}ψ_{2}(3823) and Mass Measurement of ψ_{2}(3823).
作者信息
Ablikim M, Achasov M N, Adlarson P, Albrecht M, Aliberti R, Amoroso A, An M R, An Q, Bai X H, Bai Y, Bakina O, Baldini Ferroli R, Balossino I, Ban Y, Batozskaya V, Becker D, Begzsuren K, Berger N, Bertani M, Bettoni D, Bianchi F, Bloms J, Bortone A, Boyko I, Briere R A, Brueggemann A, Cai H, Cai X, Calcaterra A, Cao G F, Cao N, Cetin S A, Chang J F, Chang W L, Chelkov G, Chen C, Chen G, Chen H S, Chen M L, Chen S J, Chen T, Chen X R, Chen X T, Chen Y B, Chen Z J, Cheng W S, Cibinetto G, Cossio F, Cui J J, Dai H L, Dai J P, Dbeyssi A, de Boer R E, Dedovich D, Deng Z Y, Denig A, Denysenko I, Destefanis M, De Mori F, Ding Y, Dong J, Dong L Y, Dong M Y, Dong X, Du S X, Egorov P, Fan Y L, Fang J, Fang S S, Fang Y, Farinelli R, Fava L, Feldbauer F, Felici G, Feng C Q, Feng J H, Fischer K, Fritsch M, Fu C D, Gao H, Gao Y N, Gao Yang, Garbolino S, Garzia I, Ge P T, Ge Z W, Geng C, Gersabeck E M, Gilman A, Goetzen K, Gong L, Gong W X, Gradl W, Greco M, Gu L M, Gu M H, Gu Y T, Guan C Y, Guo A Q, Guo L B, Guo R P, Guo Y P, Guskov A, Han T T, Han W Y, Hao X Q, Harris F A, He K K, He K L, Heinsius F H, Heinz C H, Heng Y K, Herold C, Himmelreich M, Holtmann T, Hou G Y, Hou Y R, Hou Z L, Hu H M, Hu J F, Hu T, Hu Y, Huang G S, Huang K X, Huang L Q, Huang L Q, Huang X T, Huang Y P, Huang Z, Hussain T, Hüsken N, Imoehl W, Irshad M, Jackson J, Jaeger S, Janchiv S, Ji Q, Ji Q P, Ji X B, Ji X L, Ji Y Y, Jia Z K, Jiang H B, Jiang S S, Jiang X S, Jiang Y, Jiao J B, Jiao Z, Jin S, Jin Y, Jing M Q, 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, Kühn W, Lane J J, Lange J S, Larin P, Lavania A, Lavezzi L, Lei Z H, Leithoff H, Lellmann M, Lenz T, Li C, 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 H N, Li J Q, Li J S, Li J W, Li Ke, Li L J, Li L K, Li Lei, Li M H, Li P R, Li S X, Li S Y, Li T, Li W D, Li W G, Li X H, Li X L, Li Xiaoyu, Li Z Y, Liang H, Liang H, Liang H, Liang Y F, Liang Y T, Liao G R, Liao L Z, Libby J, Limphirat A, Lin C X, Lin D X, Lin T, Liu B J, Liu C X, Liu D, Liu F H, Liu Fang, Liu Feng, Liu G M, 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 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 B, Liu Z A, Liu Z Q, Lou X C, Lu F X, Lu H J, Lu J G, Lu X L, Lu Y, Lu Y P, Lu Z H, Luo C L, Luo M X, Luo T, Luo X L, Lyu X R, Lyu Y F, Ma F C, Ma H L, Ma L L, Ma M M, Ma Q M, Ma R Q, Ma R T, Ma X Y, Ma 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, Miao H, Min T J, Mitchell R E, Mo X H, Muchnoi N Yu, Muramatsu H, Nakhoul S, Nefedov Y, Nerling F, Nikolaev I B, Ning Z, Nisar S, Niu Y, Olsen S L, Ouyang Q, Pacetti S, Pan X, Pan Y, Pathak A, Pelizaeus M, Peng H P, Peters K, Ping J L, Ping R G, Plura S, Pogodin S, Poling R, Prasad V, Qi H, Qi H R, Qi M, Qi T Y, Qian S, Qian W B, Qian Z, Qiao C F, Qin J J, Qin L Q, Qin X P, Qin X S, Qin Z H, Qiu J F, Qu S Q, Rashid K H, Ravindran K, Redmer C F, Ren K J, Rivetti A, Rodin V, Rolo M, Rong G, Rosner Ch, Sarantsev A, Schelhaas Y, Schnier C, Schoenning K, Scodeggio M, Shan K Y, Shan W, Shan X Y, Shangguan J F, Shao L G, Shao M, Shen C P, Shen H F, Shen X Y, Shi B A, Shi H C, Shi R S, Shi X, Shi X D, Song J J, Song W M, Song Y X, Sosio S, Spataro S, Stieler F, Su K X, Su P P, Su Y J, Sun G X, Sun H, Sun H K, Sun J F, Sun L, Sun S S, Sun T, Sun W Y, Sun X, Sun Y J, Sun Y Z, Sun Z T, Tan Y H, Tan Y X, Tang C J, Tang G Y, Tang J, Tao L Y, Tao Q T, Teng J X, Thoren V, Tian W H, Tian Y, Uman I, Wang B, Wang B L, Wang C W, Wang D Y, Wang F, Wang H J, Wang H P, Wang K, Wang L L, Wang M, Wang M Z, Wang Meng, Wang S, Wang S, Wang T, Wang T J, Wang W, Wang W H, Wang W P, Wang X, Wang X F, Wang X L, Wang Y D, Wang Y F, Wang Y H, Wang Y Q, Wang Z, Wang Z Y, Wang Ziyi, Wei D H, 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 X H, Wu Y, Wu Y J, Wu Z, Xia L, Xiang T, Xiao G Y, Xiao H, Xiao S Y, Xiao Y L, Xiao Z J, Xie C, Xie X H, Xie Y, Xie Y G, Xie Y H, Xie Z P, Xing T Y, Xu C F, Xu C J, Xu G F, Xu H Y, Xu Q J, Xu X P, Xu Y C, Xu Z P, Yan F, Yan L, Yan W B, Yan W C, Yang H J, Yang H L, Yang H X, Yang L, Yang S L, Yang Y X, Yang Yifan, 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 S C, Yuan X Q, Yuan Y, Yuan Z Y, Yue C X, Zafar A A, Zeng F R, Zeng X, Zeng Y, Zhan Y H, Zhang A Q, Zhang B L, Zhang B X, Zhang G Y, Zhang H, Zhang H H, Zhang H H, Zhang H Y, Zhang J L, Zhang J Q, Zhang J W, 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 X Y, Zhang Y, Zhang Y T, Zhang Y H, Zhang Yan, Zhang Yao, Zhang Z H, Zhang Z Y, 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 H, Zhong B, Zhong C, Zhong X, Zhou H, Zhou L P, Zhou X, Zhou X K, Zhou X R, Zhou X Y, Zhou Y Z, Zhu J, Zhu K, Zhu K J, Zhu L X, Zhu S H, Zhu S Q, Zhu T J, Zhu W J, 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. 2022 Sep 2;129(10):102003. doi: 10.1103/PhysRevLett.129.102003.
Using a data sample corresponding to an integrated luminosity of 11.3 fb^{-1} collected at center-of-mass energies from 4.23 to 4.70 GeV with the BESIII detector, we measure the product of the e^{+}e^{-}→π^{+}π^{-}ψ_{2}(3823) cross section and the branching fraction B[ψ_{2}(3823)→γχ_{c1}]. For the first time, resonance structure is observed in the cross section line shape of e^{+}e^{-}→π^{+}π^{-}ψ_{2}(3823) with significances exceeding 5σ. A fit to data with two coherent Breit-Wigner resonances modeling the sqrt[s]-dependent cross section yields M(R_{1})=4406.9±17.2±4.5 MeV/c^{2}, Γ(R_{1})=128.1±37.2±2.3 MeV, and M(R_{2})=4647.9±8.6±0.8 MeV/c^{2}, Γ(R_{2})=33.1±18.6±4.1 MeV. Though weakly disfavored by the data, a single resonance with M(R)=4417.5±26.2±3.5 MeV/c^{2}, Γ(R)=245±48±13 MeV is also possible to interpret data. This observation deepens our understanding of the nature of the vector charmoniumlike states. The mass of the ψ_{2}(3823) state is measured as (3823.12±0.43±0.13) MeV/c^{2}, which is the most precise measurement to date.
利用北京谱仪III（BESIII）探测器在质心能量从4.23到4.70 GeV下收集的对应于11.3 fb⁻¹积分亮度的数据样本，我们测量了e⁺e⁻→π⁺π⁻ψ₂(3823)截面与分支比B[ψ₂(3823)→γχc1]的乘积。首次在e⁺e⁻→π⁺π⁻ψ₂(3823)的截面线形中观测到共振结构，显著性超过5σ。用两个相干布赖特-维格纳共振对依赖于质心能量平方根（√s）的截面进行数据拟合，得到M(R₁)=4406.9±17.2±4.5 MeV/c²，Γ(R₁)=128.1±37.2±2.3 MeV，以及M(R₂)=4647.9±8.6±0.8 MeV/c²，Γ(R₂)=33.1±18.6±4.1 MeV。虽然数据对其支持较弱，但一个质量为M(R)=4417.5±26.2±3.5 MeV/c²，宽度为Γ(R)=245±48±13 MeV的单共振也有可能解释数据。这一观测加深了我们对类矢量粲偶素态性质的理解。ψ₂(3823)态的质量测量值为(3823.12±0.43±0.13) MeV/c²，这是迄今为止最精确的测量。
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