Determination of the resonant parameters ofχ_(c0)(3915)with global fit  

作　　者：李春花 王希俊 吴晨 Chunhua Li;Xijun Wang;Chen Wu(Department of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China;Center for Theoretical and Experimental High Energy Physics,Liaoning Normal University,Dalian 116029,China)

机构地区：[1]Department of Physics and Electronic Technology,Liaoning Normal University,Dalian 116029,China [2]Center for Theoretical and Experimental High Energy Physics,Liaoning Normal University,Dalian 116029,China

出　　处：《Chinese Physics C》2024年第6期1-4,共4页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(NSFC)(11805090)。

摘　　要：Particle χ_(c0)(3915) was first observed by the Belle experiment in the ωJ/ψ invariant mass spectrum in the process B→KωJ/ψ and subsequently confirmed by the BaBar experiment.Both experiments reported the resonant parameters of this particle in the processes γγ→ωJ/ψ and B→KωJ/ψ assuming χ_(c0)(3915) as an S-wave Breit-Wigner resonance.We performed a global fit to the distributions of invariant mass of ωJ/ψ measured by the Belle and BaBar experiments and additionally incorporated the measurements reported by the LHCb experiment to extract the mass and width of χ_(c0)(3915).We obtained M=3920.9±0.9 MeV/c^(2) and Γ=18.2±2.4 MeV,which are consistent with the values from PDG within one standard deviation but with higher precision.

关 键 词：charmonimum-like state χ_(c0)(3915) global fit MASS WIDTH 

分 类 号：O572.2[理学—粒子物理与原子核物理]