论文标题
质子数累积物和相关函数来自流体动力学和QCD相图
Proton number cumulants and correlation functions from hydrodynamics and the QCD phase diagram
论文作者
论文摘要
我们通过使用流体动力学模拟分析了重离子中心碰撞范围内的（净）质子数累积物的行为。该计算涵盖了对质子波动的基本非关键贡献，例如排斥的重态核心和确切的巴属数量保存。实验数据与碰撞能量的非关键物理$ \ sqrt {s _ {\ rm nn}}} \ geq 20 $ GEV一致。来自较低碰撞能量的Star和Hades合作的数据表明，超过（多）质子相关性超过了非关键参考。在不同的机制的背景下讨论了这一观察结果，包括在QCD相图的Baryon丰富区域中临界点的可能性。
We analyze the behavior of (net-)proton number cumulants in central collisions of heavy ions across a broad collision energy range by utilizing hydrodynamic simulations. The calculations incorporate essential non-critical contributions to proton fluctuations such as repulsive baryonic core and exact baryon number conservation. The experimental data are consistent with non-critical physics at collision energies $\sqrt{s_{\rm NN}} \geq 20$ GeV. The data from STAR and HADES Collaborations at lower collision energies indicate an excess of (multi-)proton correlations over the non-critical reference. This observation is discussed in the context of different mechanisms, including the possibility of a critical point in the baryon-rich region of the QCD phase diagram.
