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arXiv 1702.04161hep-ph
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热磁非局域NJL模型的临界端点

Critical end point in a thermo-magnetic nonlocal NJL model

F. Marquez, R. Zamora

摘要:

本文探讨了弱场极限下热磁非定域Nambu-Jona-Lasinio模型的$T-μ$相图中的临界端点。我们与高斯调节器,并发现交叉发生在$μ, B=0$。当化学势或磁场增加时,过渡转变为一级相变。随着磁场的增加,相图的临界终点出现在较高的温度和较低的化学势处。这一结果与其他有效模型中的类似结果一致。我们还发现存在一个临界磁场,在该磁场下,即使在$μ=0$处也发生一级相变。

英文摘要:

In this article we explore the critical end point in the $T-μ$ phase diagram of a thermomagnetic nonlocal Nambu--Jona-Lasinio model in the weak field limit. We work with the Gaussian regulator, and find that a crossover takes place at $μ, B=0$. The crossover turns to a first order phase transition as the chemical potential or the magnetic field increase. The critical end point of the phase diagram occurs at a higher temperature and lower chemical potential as the magnetic field increases. This result is in accordance to similar findings in other effective models. We also find there is a critical magnetic field, for which a first order phase transition takes place even at $μ=0$.

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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