QCD phase transition with non-extensive NJL model in the strong magnetic field

Jia Zhang; Xin-Jian Wen

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arXiv · 2410.23550

QCD phase transition with non-extensive NJL model in the strong magnetic field

Jia Zhang·Xin-Jian Wen

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Abstract

In this work we make use of the Nambu-Jona-Lasinio model to investigate thermodynamic properties of magnetized three-flavor quark matter. The non-equilibrium Tsallis distribution is characterized by a dimensionless non-extensive parameter $q$. We find that the system always undergoes a crossover transition for all given $q$ values and the pseudo-critical temperature decreases with the increasing non-extensive parameter. We show that the variation of the pressure and its anisotropy in parallel and perpendicular directions. However, the diamagnetic nature appears within a certain temperature range at zero chemical potential. Moreover, strong magnetic fields can affect the property of a non-extensive system by changing the magnetization significantly. At high temperatures, the paramagnetic nature always occur no matter how strong the magnetic field is. Finally, we study the effects of non-extensive parameter $q$ on the trace anomaly and the speed of sound of the system.

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Jia Zhang, Xin-Jian Wen. 2024-10-31. QCD phase transition with non-extensive NJL model in the strong magnetic field. https://arxiv.org/abs/2410.23550

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