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arXiv · 2201.11427

Correlations between the deconfining and chiral transitions in holographic QCD

Ying-Ying Li·Xing-Lin Liu·Xin-Yi Liu·Zhen Fang
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Abstract

We consider an improved soft-wall AdS/QCD model coupled to an Einstein-dilaton system, which offers a way to study the deconfining and chiral transitions simultaneously. The correlation between these two transitions has been investigated in detail in the Einstein-dilaton-scalar system with the bulk scalar field representing the vacuum of matters in the flavor sector of the model. We find that the effects of the scaling dimension $Δ$ of the dual operator of the dilaton manifest in chiral transitions, although the equation of state can all be matched with the two-flavor lattice results for $Δ=2.5, 3, 3.5$ in the decoupling case of $β=0$. In the weak-coupling case with smaller $β$, both the equation of state and the chiral transition exhibit a crossover behavior and turn into first-order phase transitions with the increase of $β$.

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Ying-Ying Li, Xing-Lin Liu, Xin-Yi Liu, Zhen Fang. 2022-01-27. Correlations between the deconfining and chiral transitions in holographic QCD. https://doi.org/10.1103/physrevd.105.034019

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