论文标题
血浆筛选和QCD相图中的临界终点
Plasma screening and the critical end point in the QCD phase diagram
论文作者
论文摘要
在重离子碰撞中，已知保守电荷的波动是敏感的可观察到对QCD相变的关键性的敏感性，并定位了推定的临界终点（CEP）的位置。在这项工作中，我们试图表明，带有夸克的线性Sigma模型对QCD相图产生有效的描述，在QCD相图中，在环形图的贡献中编码的血浆筛选效果是由于血浆筛选效应引起的。考虑到这些，可以将远程相关性的效果包括在描述中。为了设置模型参数，我们使用LQCD结果用于消失的化学势时的交叉过渡。最后，研究模型中的重子数量波动，我们表明CEP可以位于HADES和/或NICA Energy域的最低端，$ \ sqrt {s_ {nn}} \ sim 2 $ gev。
In heavy-ion collisions, fluctuations of conserved charges are known to be sensitive observables to probe criticality for the QCD phase transition and to locate the position of the putative critical end point (CEP). In this work we seek to show that the Linear Sigma Model with quarks produces an effective description of the QCD phase diagram in which deviations from a Hadron Resonance Gas are due to plasma screening effects, encoded in the contribution of the ring diagrams. Accounting for these, it is possible to include in the description the effect of long-range correlations. To set the model parameters we use LQCD results for the crossover transition at vanishing chemical potential. Finally, studying baryon number fluctuations from the model, we show that the CEP can be located within the HADES and/or the lowest end of the NICA energy domain, $\sqrt{s_{NN}}\sim 2$ GeV.
