论文标题
基础o（4）临界性对净质子数量波动的影响
Impact of the underlying O(4) criticality on net-proton number fluctuations
论文作者
论文摘要
我们讨论了使用以现象学动机的模型计算的Net-Proton数字前四个累积物比的比率依赖性，在该模型中，关键模式波动对质子对质子和抗质子。该模型考虑了在$ z（2）$关键点的存在下，基础$ o（4）$ trigation对QCD相图的影响。这使我们能够在定性地捕获最低比率的单调行为和高阶比率的非单调行为，这在Star Collaboration的实验数据中可以看到。我们还讨论了结果对临界模式与质子之间的耦合强度以及临界点的位置之间的依赖性。
We discuss the beam-energy dependence of ratios of the first four cumulants of the net-proton number, calculated using a phenomenologically motivated model in which critical mode fluctuations couple to protons and anti-protons. The model takes into account an impact of the underlying $O(4)$ criticality on the QCD phase diagram in the presence of a $Z(2)$ critical point. This allows us to capture qualitatively both the monotonic behavior of the lowest-order ratio and the non-monotonic behavior of higher-order ratios which are seen in the experimental data from the STAR Collaboration. We also discuss the dependence of our results on the coupling strength between the critical mode and the protons as well as the location of the critical point.
