Hard Photons from a Non-Equilibrated Quark-Gluon Plasma with Finite Baryon Density at a Two-Loop Level  

作　　者：贺泽君 龙家丽 马余刚 

机构地区：[1]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, PO Box 800-204, Shanghai 201800 [2]CCAST (World Laboratory), PO Box 8730, Beijing 100080 [3]Graduate School of the Chinese Academy of Sciences, Beijing 100049

出　　处：《Chinese Physics Letters》2005年第10期2519-2522,共4页中国物理快报（英文版）

基　　金：Supported in part by the Knowledge Innovation Project of Chinese Academy of Sciences under Grant No KJCX2-N11, the National Natural Science Foundation of China under Grant Nos 10405031, 10275002, 10328509 and 10135030, the Major State Basic Research and Development Programme of China under Grant No G200077400.

摘　　要：We study hard photon production from a two-loop level （bremsstrahlung and annihilation with scattering） in a chemically equilibrating quark-gluon plasma at finite baryon density based on Jüttner distribution of partons of the system. We find that the photon yield from the two-loop level increases obviously with the increasing initial quark chemical potential.We study hard photon production from a two-loop level （bremsstrahlung and annihilation with scattering） in a chemically equilibrating quark-gluon plasma at finite baryon density based on Jüttner distribution of partons of the system. We find that the photon yield from the two-loop level increases obviously with the increasing initial quark chemical potential.

关 键 词：STRANGENESS PRODUCTION THERMAL PHOTONS SUPPRESSION NONEQUILIBRIUM COLLISIONS EMISSION GAS 

分 类 号：O572.31[理学—粒子物理与原子核物理]