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arXiv 1208.0917hep-phhep-lathep-thnucl-th
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磁背景下的热手征跃迁和退精细跃迁

Thermal chiral and deconfining transitions in the presence of a magnetic background

Eduardo S. Fraga

摘要:

我们回顾了磁场背景对强相互作用相图的影响,以及如何影响手性和退澄清跃迁。首先,我们总结了在耦合到夸克和Polyakov圈的线性西格玛模型的框架内获得的两种跃迁的结果,以及它们如何与其他有效的模型方法和格点量子色动力学进行比较。然后,我们讨论了磁性MIT袋模型的结果,该模型产生了与最近的晶格结果和磁催化相容的临界退澄清温度的行为。磁性MIT袋模型的定性成功暗示了$T_{c}$是一个约束驱动的量,并引导我们讨论它的行为在QCD的大$N_{c}$极限内的预测,这也符合最新的格点量子色动力学结果,前提是夸克的行为是顺磁性的。

英文摘要:

We review the influence of a magnetic background on the phase diagram of strong interactions and how the chiral and deconfining transitions can be affected. First we summarize results for both transitions obtained in the framework of the linear sigma model coupled to quarks and to the Polyakov loop, and how they compare to other effective model approaches and to lattice QCD. Then we discuss the outcome of the magnetic MIT bag model that yields a behavior for the critical deconfining temperature which is compatible with recent lattice results and magnetic catalysis. The qualitative success of the magnetic MIT bag model hints to $T_{c}$ being a confinement-driven quantity, and leads us to the discussion of its behavior as predicted within the large-$N_{c}$ limit of QCD, which is also in line with the most recent lattice QCD results provided that quarks behave paramagnetically.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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