Generalized quark number susceptibilities from fugacity expansion at finite chemical potential for N f = 2 Wilson fermions
Generalized quark number susceptibilities from fugacity expansion at finite chemical potential for N f = 2 Wilson fermions
复制标题
N f = 2 Wilson 费米子在有限化学势下的逸度膨胀产生的广义夸克数磁化率
DOI：
10.1103/physrevd.91.074511
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发表时间：
2014
影响因子：
5
通讯作者：
H. Schadler
中科院分区：
文献类型：
--
作者：
C. Gattringer;H. Schadler
净夸克数的广义可调性被认为是QCD相图中跃迁和寻找可能的临界端点的良好探针。在这篇文章中，我们探索了一种新的策略，通过对逸度参数${e}^{\ensuremath{\mu}\ensuremath{\beta}}$的展开，从格点QCD计算夸克数的可计算性。所有的夸克数相关的散装可观的是特别容易在这种方法中访问，我们提出的结果，广义夸克数的可测量性高达四阶。这些数量的比率进行了研究，并与模型计算的高，低温区域的化学势为$\ensuremath{\mu}\ensuremath{\beta}\ensuremath{\approx}1.0$。
Generalized susceptibilities of the net quark number have been proposed to be good probes for the transitions in the QCD phase diagram and for the search of a possible critical end point. In this article we explore a new strategy for computing quark number susceptibilities from lattice QCD via an expansion in the fugacity parameter ${e}^{\ensuremath{\mu}\ensuremath{\beta}}$. All quark number related bulk observables are particularly easy to access in this approach, and we present results for generalized quark number susceptibilities up to fourth order. Ratios of these quantities are studied and compared with model calculations for the high- and low-temperature regions up to a chemical potential of $\ensuremath{\mu}\ensuremath{\beta}\ensuremath{\approx}1.0$.