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arXiv 2201.11427hep-ph
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全息QCD的退精细化和手征跃迁之间的关联

Correlations between the deconfining and chiral transitions in holographic QCD

Ying-Ying Li, Xing-Lin Liu, Xin-Yi Liu, Zhen Fang

摘要:

我们考虑一个改进的软壁AdS/QCD模型耦合到一个Einstein-Schwarzson系统,它提供了一种方法来研究退禁闭和手征跃迁同时进行。这两个跃迁之间的相关性已被详细研究在爱因斯坦标量系统与体标量场代表物质的真空在味部门的模型。我们发现,尽管在$β=0$的退耦情况下,状态方程都可以与$Δ=2.5, 3, 3.5$的双味晶格结果相匹配,但在手性跃迁中,介子对偶算符的标度维数$Δ$的影响是明显的.当$β$较小时,随着$β$的增加,体系的状态方程和手性跃迁都呈现出交叉行为,并转变为一级相变.

英文摘要:

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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