Dilepton Production in an Expanding Hot Baryon-Rich Quark-Gluon Matter  

作　　者：He Ze-jun ZHANG Jia-ju JIANG Wei-Zhou QIU Xi-jun LIU Bo 贺泽君;张家驹;蒋维洲;邱锡钧;刘波(Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000;Institute of Nuclear Research,Chinese Academy of Sciences,Shanghai 201800;Institute of High Energy,Chinese Academy of Sciences,Beijing 100039)

机构地区：[1]Center of Theoretical Nuclear Physics,National Laboratory of Heavy Ion Accelerator,Lanzhou 730000 [2]Institute of Nuclear Research,Chinese Academy of Sciences,Shanghai 201800 [3]Institute of High Energy,Chinese Academy of Sciences,Beijing 100039

出　　处：《Chinese Physics Letters》1999年第4期259-261,共3页中国物理快报（英文版）

基　　金：Supported by the 95'Key Project Funds of the Chinese Academy of Sciences under Grant No.KJ 951-A1-410.

摘　　要：From the full stopping scenario,a relativistic hydrodynamic model describing the evolution of the baryon-rich quark-gluon matter fire-cylinder has been established.Based on it,the rapidity Distribution of dileptons with intermediate invariant masses has been studied.It is found that the quark phase gives the dominant contribution to the dilepton spectrum due to the influence of the phase boundary on the evolution of the system,especially the dilepton yield is strongly suppressed with the increasing rapidity.

关 键 词：QUARK LEPTON INVARIANT 

分 类 号：O57[理学—粒子物理与原子核物理]