QCD临界点与重子高密度物质
QCD Critical Point and High Baryon Density Matter
摘要：
本文报道了利用高能重离子碰撞在QCD相图中寻找QCD临界点的最新结果。所讨论的测量是基于重离子碰撞中净质子多重数分布的高次矩。一个非单调的变化，在产品的峰度倍的净质子分布的方差观察到作为一个函数的碰撞能量与3 $σ$的意义。我们还讨论了热模型在解释重离子碰撞中测得的粒子产额比方面的结果，并比较了不同的Hardon共振气体模型计算结果与净质子分布的高阶矩数据。最后指出，在未来的重子密度区的各种实验设施的计划将完成通过重离子碰撞的QCD临界点的搜索。
英文摘要：
We report the latest results on the search for the QCD critical point in the QCD phase diagram through high energy heavy-ion collisions. The measurements discussed are based on the higher moments of the net-proton multiplicity distributions in heavy-ion collisions. A non-monotonic variation in the product of kurtosis times the variance of the net-proton distribution is observed as a function of the collision energy with 3$σ$ significance. We also discuss the results of the thermal model in explaining the measured particle yield ratios in heavy-ion collisions and comparison of the different variants of hardon resonance gas model calculation to the data on higher moments of net-proton distributions. We end with a note that the upcoming programs in high baryon density regime at various experimental facilities will complete the search for the QCD critical point through heavy-ion collisions.
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