基于RHIC能区光子椭圆流和LHC能区π0衰变光子的背景研究  

Investigations on photon elliptic flow at RHIC and combinatorial background of photon from π0 decay at LHC energy

作　　者：汪仲文[1] 吴怡芬[2] 

机构地区：[1]新疆喀什师范学院数学系,新疆喀什844006 [2]新疆喀什师范学院物理系,新疆喀什844006

出　　处：《华中师范大学学报（自然科学版）》2009年第2期222-225,共4页Journal of Central China Normal University：Natural Sciences

基　　金：国家自然科学基金资助项目(10747003)

摘　　要：高能碰撞中产生的直接光子具有较长的平均自由程，几乎不与其它粒子发生较强的相互作用，因而直接光子是研究高能重离子碰撞初期形成的热密物质性质的有效探针之一．本文系统地介绍TRHIC能区直接光子椭圆流v2的相关研究结果．利用HIJING蒙特卡洛模型，研究了LHC能区π0衰变双光子背景的不对称因子，并与PHENIX实验的结果进行了比较，发现两者在定性上一致．Direct photon is one of the most effective probes to study properties of hot dense medium at initial state of heavy ion collisions since photons almost do not interact strongly with any other particles, causing by its long mean free path. The elliptic flow v2 of inclusive and direct photon at RHIC energies are reviewed. By using the HIJING Monte Carlo model, the asymmetry of photon background from decay of π0 at LHC energy is investigated. It is found that the result of simulation is qualitatively consistent with PHENIX result.

关 键 词：直接光子 高能重离子碰撞 平均自由程 椭圆流 不对称因子 

分 类 号：O571.21[理学—粒子物理与原子核物理]