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北美退伍军人节(Veterans Day),12 日无更新
arXiv 0811.4543hep-phnucl-th
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(P)NJL类模型中的phase diagram方面

Aspects of the phase diagram in (P)NJL-like models

M. Buballa, A. G. Grunfeld, A. E. Radzhabov, D. Scheffler

摘要:

我们讨论了NJL和PNJL类模型的三个应用,以评估QCD相图的各个方面:首先,我们研究了介子相关性对压力低于和高于有限温度相变内的非局域PNJL模型超越平均场近似的影响。其次,我们利用手征极化率关于$μ= 0$的泰勒展开重建了NJL模型的相边界,并与精确的相边界进行了比较。最后,我们展示了实现的“非标准的情况下”的临界面在三味PNJL模型与$μ$依赖的行列式相互作用。

英文摘要:

We discuss three applications of NJL- and PNJL-like models to assess aspects of the QCD phase diagram: First, we study the effect of mesonic correlations on the pressure below and above the finite temperature phase transition within a nonlocal PNJL model beyond the mean-field approximation. Second, we reconstruct the phase boundary of an NJL model from a Taylor expansion of the chiral susceptibility about $μ= 0$ and compare the result with the exact phase boundary. Finally, we demonstrate the realization of the "non-standard scenario" for the critical surface in a three-flavor PNJL model with a $μ$-dependent determinant interaction.

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