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arXiv · 1810.12525

Chiral phase transition and QCD phase diagram from AdS/QCD

Zhen Fang·Yue-Liang Wu·Lin Zhang
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Abstract

We study the chemical potential effects on the chiral phase transition in a simply improved soft-wall AdS/QCD model, which can realize consistently the properties of linear confinement and spontaneous chiral symmetry breaking. The $\mu-T$ phase diagrams with both zero and physical quark masses have been obtained from this model. For the case of physical quark mass, the chiral transition has a crossover behavior at low chemical potential. With the increase of the chemical potential $\mu$, the critical temperature $T_c$ descends towards zero, and the crossover transition turns into a first-order one at some intermediate value of $\mu$, which implies that a critical end point naturally exists in this improved soft-wall model. All these features agree with our current perspective on the QCD phase diagram.

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Zhen Fang, Yue-Liang Wu, Lin Zhang. 2018-10-30. Chiral phase transition and QCD phase diagram from AdS/QCD. https://doi.org/10.1103/physrevd.99.034028

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