Fine splitting in the charmonium spectrum with a channel coupling effect  

作　　者：杨春 李瀑飞 陈晓林 邓卫真 

机构地区：[1]Department of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University [2]Department of Physics,Peking University

出　　处：《Chinese Physics C》2011年第9期797-803,共7页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China (10675008)

摘　　要：We study the fine splitting in the charmomium spectrum in the quark model with the channel coupling effect, including DD, DD＊, D＊D＊ and DsDs, DsDs＊, Ds＊Ds＊ channels. The interaction for channel coupling is constructed from the current-current Lagrangian related to the color confinement and the onegluon exchange potentials. By adopting the massive gluon propagator from the lattice cMculation in the nonperturbative region, the coupling interaction is further simplified to four-fermion interaction. The numerical calculation still prefers the assignment 1＋＋ of X（3872）.We study the fine splitting in the charmomium spectrum in the quark model with the channel coupling effect, including DD, DD＊, D＊D＊ and DsDs, DsDs＊, Ds＊Ds＊ channels. The interaction for channel coupling is constructed from the current-current Lagrangian related to the color confinement and the onegluon exchange potentials. By adopting the massive gluon propagator from the lattice cMculation in the nonperturbative region, the coupling interaction is further simplified to four-fermion interaction. The numerical calculation still prefers the assignment 1＋＋ of X（3872）.

关 键 词：quark model four-fermion interaction COUPLED-CHANNEL X（3872） 

分 类 号：O572.33[理学—粒子物理与原子核物理]