Parton energy loss in hot and dense QCD medium  

作　　者：LIU Jie MAO Yaxian XIANG Wenchang ZHOU Daicui 

机构地区：[1]Institute of Particle Physics, Huazhong Normal University, Wuhan 430079, China

出　　处：《Chinese Science Bulletin》2006年第2期139-142,共4页

基　　金：We thank Prof.Zakharov,Dr.Zhang B.W and Ding H.T for their helpful discussions.This work was supported by the National Natural Science Foundation of China(Grant No.A10575044);China Ministry of Education.

摘　　要：Induced gluon radiation and energy loss of heavy quark in hot and dense QCD media are discussed. Using the light-cone path integral ap- proach, an analytical formula of the energy loss of heavy quark is derived. The results show that the quark energy loss obviously depends on the mass of quark, i. e. a remarkable suppression occurs in the case of heavy quark comparing to a light one. The radiative energy loss of energetic quark is propor- tional to L2, where L is the length of the medium. The dependence of energy loss on L2 turns to L with de- creasing quark energy.Induced gluon radiation and energy loss of heavy quark in hot and dense QCD media are discussed. Using the light-cone path integral approach, an analytical formula of the energy loss of heavy quark is derived. The results show that the quark energy loss obviously depends on the mass of quark, i. e. a remarkable suppression occurs in the case of heavy quark comparing to a light one. The radiative energy loss of energetic quark is proportional to L2, where L is the length of the medium. The dependence of energy loss on L2 turns to L with decreasing quark energy.

关 键 词：高能物理学 重离子碰撞 锥形路线积分法 重夸克 能量损失 

分 类 号：O572.33[理学—粒子物理与原子核物理]