在J/ψ→γπ⁺π⁻η'过程中对π⁺π⁻η'系统中X(2600)态的观测
Observation of a State X(2600) in the π^{+}π^{-}η' System in the Process J/ψ→γπ^{+}π^{-}η'.
作者信息
Ablikim M, Achasov M N, Adlarson P, Ahmed S, 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, 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, Cui X F, Dai H L, Dai J P, Dai X C, Dbeyssi A, de Boer R E, 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, 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, Fritsch M, Fu C D, Gao Y N, Gao Yang, Garzia I, Ge P T, Geng C, Gersabeck E M, Gilman A, Goetzen K, Gong L, Gong W X, Gradl W, Greco M, Gu M H, Guan C Y, Guo A Q, 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 L Q, Huang X T, Huang Y P, Huang Z, Hussain T, Hüsken N, Ikegami Andersson W, Imoehl W, Irshad M, Jaeger S, Janchiv S, Ji Q, Ji Q P, Ji X B, Ji X L, Ji Y Y, Jiang H B, Jiang S S, Jiang X S, 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, Kurth M G, 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 L, Li J Q, Li J S, 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 M, Liu Huanhuan, Liu Huihui, Liu J B, Liu J L, Liu J Y, Liu K, Liu K Y, Liu Ke, Liu L, Liu M H, Liu P L, Liu Q, Liu S B, Liu T, 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, 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 X, 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, Olsen S L, Ouyang Q, Pacetti S, Pan X, Pan Y, Pathak A, Pathak A, Patteri P, Pelizaeus M, Peng H P, Peters K, Pettersson J, 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, Rump M, Sang H S, 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 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 T, Uman I, Wang B, 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 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 Q, Wang Y Y, Wang Ying, Wang Z, Wang Z Y, Wang Ziyi, Wang Zongyuan, 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 Z, Xia L, Xiang T, Xiao H, Xiao S Y, Xiao Y L, Xiao Z J, Xie X H, Xie Y G, Xie Y H, Xing T Y, Xu C F, Xu C J, Xu G F, Xu Q J, Xu S Y, Xu W, Xu X P, Xu Y C, Yan F, Yan L, Yan W B, Yan W C, Yang H J, Yang H X, Yang L, Yang S L, Yang Y X, 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 S C, Yuan X Q, Yuan Y, Yuan Z Y, Yue C X, Zafar A A, Zeng X, Zeng Y, 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 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, Zhou L P, Zhou Q, Zhou X, Zhou X K, Zhou X R, Zhou X Y, Zhou Y Z, Zhu A N, Zhu J, Zhu K, Zhu K J, Zhu S H, Zhu T J, Zhu W 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 Jul 22;129(4):042001. doi: 10.1103/PhysRevLett.129.042001.
Based on (10087±44)×10^{6} J/ψ events collected with the BESIII detector, the process J/ψ→γπ^{+}π^{-}η^{'} is studied using two largest decay channels of the η^{'} meson, η^{'}→γπ^{+}π^{-} and η^{'}→ηπ^{+}π^{-}, η→γγ. A new resonance, which we denote as the X(2600), is observed with a statistical significance larger than 20σ in the π^{+}π^{-}η^{'} invariant mass spectrum, and it has a connection to a structure around 1.5 GeV/c^{2} in the π^{+}π^{-} invariant mass spectrum. A simultaneous fit on the π^{+}π^{-}η^{'} and π^{+}π^{-} invariant mass spectra with the two η^{'} decay modes indicates that the mass and width of the X(2600) state are 2618.3±2.0_{-1.4}^{+16.3} MeV/c^{2} and 195±5_{-17}^{+26} MeV, where the first uncertainties are statistical, and the second systematic.
基于北京谱仪III（BESIII）探测器收集的（10087±44）×10⁶个J/ψ事例，利用η′介子的两个最大衰变道η′→γπ⁺π⁻和η′→ηγπ⁺π⁻、η→γγ，对过程J/ψ→γπ⁺π⁻η′进行了研究。在π⁺π⁻η′不变质量谱中观测到一个新的共振态，我们将其记为X（2600），其统计显著性大于20σ，并且它与π⁺π⁻不变质量谱中1.5 GeV/c²附近的一个结构有关。对具有两种η′衰变模式的π⁺π⁻η′和π⁺π⁻不变质量谱进行同时拟合表明，X（2600）态的质量和宽度分别为2618.3±2.0₋₁.₄⁺¹⁶.₃ MeV/c²和195±5₋₁₇⁺²⁶ MeV，其中第一个不确定度为统计不确定度，第二个为系统不确定度。
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