Charmonium dissociation in collisions with φ mesons in hadronic matter  

作　　者：季石涛 许晓明 

机构地区：[1]Department of Physics, Shanghai University, Baoshan, Shanghai 200444, China

出　　处：《Chinese Physics C》2017年第2期105-111,共7页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11175111)

摘　　要：The φ-charmonium dissociation reactions in hadronic matter are studied.Unpolarised cross sections for ФJ/ψ → Ds^-Ds^＋, ФJ/ψ →Ds^＊-Ds^＋ or Ds^-Ds^＊＋, ФJ/ψ →Ds^＊-Ds^＊＋, Фψ′→Ds^＊-Ds^＋, Фψ′→ Ds^＊-Ds^＋ or Ds^-Ds^＊＋,Фψ′→Ds^＊-Ds^＊＋,Фχc →Ds^-Ds^＋, Фχc→Ds^＊-Ds^＋ or Ds^-Ds^＊＋ and Фχc → Ds^＊-Ds^＊＋ are calculated in the Born approximation,in the quark-interchange mechanism and with a temperature-dependent quark potential.The potential leads to remarkable temperature dependence of the cross sections.With the cross sections and the Ф distribution function we calculate the dissociation rates of the charmonia in interactions with the Ф meson in hadronic matter.The dependence of the rates on temperature and charmonium momentum is relevant to the influence of Ф mesons on charmonium suppression.The φ-charmonium dissociation reactions in hadronic matter are studied.Unpolarised cross sections for ФJ/ψ → Ds^-Ds^＋, ФJ/ψ →Ds^＊-Ds^＋ or Ds^-Ds^＊＋, ФJ/ψ →Ds^＊-Ds^＊＋, Фψ′→Ds^＊-Ds^＋, Фψ′→ Ds^＊-Ds^＋ or Ds^-Ds^＊＋,Фψ′→Ds^＊-Ds^＊＋,Фχc →Ds^-Ds^＋, Фχc→Ds^＊-Ds^＋ or Ds^-Ds^＊＋ and Фχc → Ds^＊-Ds^＊＋ are calculated in the Born approximation,in the quark-interchange mechanism and with a temperature-dependent quark potential.The potential leads to remarkable temperature dependence of the cross sections.With the cross sections and the Ф distribution function we calculate the dissociation rates of the charmonia in interactions with the Ф meson in hadronic matter.The dependence of the rates on temperature and charmonium momentum is relevant to the influence of Ф mesons on charmonium suppression.

关 键 词：charmonium dissociation cross sections quark-interchange mechanism dissociation rate 

分 类 号：O572.33[理学—粒子物理与原子核物理]