Pole determination of X(3960)and X_(0)(4140) in the decay B^(+)→D_(s)^(+)D_(s)^(−)K^(+)  

作　　者：Jialiang Lu Mao Song Gang Li Xuan Luo 卢家亮;宋昂;李刚;罗旋(Anhui University,Hefei 230601,China)

机构地区：[1]Anhui University,Hefei 230601,China

出　　处：《Chinese Physics C》2025年第2期27-32,共6页中国物理C(英文版)

基　　金：Supported partly by the National Natural Science Foundation of China(12205002);the Natural Science Foundation of Anhui Province,China(2108085MA20,2208085MA10);the key Research Foundation of Education Ministry of Anhui Province of China(KJ2021A0061)。

摘　　要：Two near-threshold peaking structures with spin-parities of J^(PC)=0^(++)were recently discovered by the LHCb Collaboration in the invariant mass distribution of the decay process B^(+)→D_(s)^(+)D_(s)^(-)K^(+).In our study,we employed a coupled-channel model to fit the experimental results published by the LHCb Collaboration,simultaneously fitting the model to the invariant mass distributions of,MD_(s)+D_(s)^(-),M_(D)_(S)^(+)K^(+)and.We utilized a coupled-channel model to search for the poles of and.The determination of the poles is meaningful in itself,and it also lays a foundation for future research on and.Upon turning off the coupled-channel and performing another fit,we observed a change in the fitting quality,and the effect was almost entirely due to the peak of.Therefore,we suggest that may not be a kinematic effect.

关 键 词：hadron-hadron interactions heavy-particle decays quark model strong interaction exotic mesons heavy mesons 

分 类 号：O572.33[理学—粒子物理与原子核物理]