Explore QCD phase transition with thermal photons
Explore QCD phase transition with thermal photons
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用热光子探索 QCD 相变
DOI：
10.13538/j.1001-8042/nst.2013.05.024
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发表时间：
2013
影响因子：
2.8
通讯作者：
Liu Fuming
中科院分区：
文献类型：
--
作者：
Liu Fuming
本初步研究旨在评估具有热光子发射的量子色动力学（QCD）相图的高温和零重子密度区域，其中QCD相变的性质是模糊的。基于(3+1)-D理想流体动力学模型，研究了2.76 TeV Pb+Pb碰撞所发射的热光子。结果表明，高能中心重离子碰撞产生的光子可以区分热致密物质的QGP相或强子相结构，从而为探索这种有限温度QCD跃迁（即一阶、二阶或解析交叉）的性质提供了一种方法。
This pilot study was to assess the high temperature and zero baryon density region of quantum chromodynamics(QCD) phase diagram with thermal photon emission,where the nature of QCD phase transition is ambiguous.Based on a(3+1)-D ideal hydrodynamical model to describe macroscopically the collision system,thermal photons emitted from Pb+Pb collisions at 2.76 TeV are investigated.The result reveals that photons from heavy ion collisions at high energy and centrality are possible to distinguish the structure of the hot dense matter,in QGP phase or hadronic phase,thus may provide an approach to explore the nature of this finite-temperature QCD transition(that is,first-order,second-order or analytic crossover).