相对论性重离子碰撞中守恒量的对角和非对角可达性
Diagonal and off-diagonal susceptibilities of conserved quantities in relativistic heavy-ion collisions
摘要：
重子数、奇异度和电荷等守恒量的磁化率对量子色动力学（QCD）相变的发生非常敏感，有望为重离子碰撞实验中产生的物质提供信息。本文采用强子共振气体（HRG）模型和强子输运模型UrQMD对二阶对角极化率和交叉关联进行了全面的研究。我们进行了详细的分析的效果的探测器接受和粒子种类的选择在实验测量的重离子碰撞对应的\sNN = 4 GeV至200 GeV的可磁化率。横向动量截止依赖适当归一化的磁化率提出了有用的观测探测介质的性质在冻结。
英文摘要：
Susceptibilities of conserved quantities, such as baryon number, strangeness and electric charge are sensitive to the onset of quantum chromodynamics (QCD) phase transition and are expected to provide information on the matter produced in heavy-ion collision experiments. A comprehensive study of the second-order diagonal susceptibilities and cross correlations has been made within a thermal model approach of the hadron resonance gas (HRG) model as well as with a hadronic transport model, UrQMD. We perform a detailed analysis of the effect of detector acceptances and choice of particle species in the experimental measurements of the susceptibilities for heavy-ion collisions corresponding to \sNN = 4 GeV to 200 GeV. The transverse momentum cutoff dependence of suitably normalised susceptibilities are proposed as useful observables to probe the properties of the medium at freezeout.
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