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arXiv 1503.08140hep-lathep-ph
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强耦合下的QCD phase diagram

QCD phase diagram from the lattice at strong coupling

Philippe de Forcrand, Owe Philipsen, Wolfgang Unger

摘要:

在强耦合极限下的格点量子色动力学相图可以在全$μ$ - $T$平面上测量,也可以在手征极限下测量。特别地,在手征极限中的相图以在某个$(μ_c,T_c)$处的三临界点为特征。这一点可能与QCD相图中预期的临界终点有关。我们讨论了强耦合下相图的规范修正,并将我们的结果与连续QCD中各种可能的情形进行了比较。我们评论的可能性,在强耦合的三临界点连接到连续,无质量QCD的三临界点。

英文摘要:

The phase diagram of lattice QCD in the strong coupling limit can be measured in the full $μ$-$T$ plane, also in the chiral limit. In particular, the phase diagram in the chiral limit features a tricritical point at some $(μ_c,T_c)$. This point may be related to the critical end point expected in the QCD phase diagram. We discuss the gauge corrections to the phase diagram at strong coupling and compare our findings with various possible scenarios in continuum QCD. We comment on the possibility that the tricritical point at strong coupling is connected to the tricritical point in the continuum, massless QCD.

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