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arXiv 2001.07990hep-phhep-th
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从标量胶球谱计算AdS/QCD的退禁闭温度

Deconfinement temperature in AdS/QCD from the spectrum of scalar glueballs

S. S. Afonin, A. D. Katanaeva, E. V. Prokhvatilov, M. I. Vyazovsky

摘要:

我们仔细检查各种全息估计的自下而上的AdS/QCD模型内的解除禁闭温度。特别强调了全息方法中等谱势的最新想法。它表明,不同的模型,从一个等谱家庭(即,导致对具有固定量子数的强子的谱的相同预测的模型)导致对解除禁闭温度的不同预测。这种差异在标量胶球通道中很小,但在矢量介子通道中却很大,矢量介子通道常被用来固定全息模型的参数。在前一种情况下观察到的稳定性显然有利于选择胶球通道的热力学预测AdS/QCD模型,标量胶球轨迹被从晶格模拟和软壁全息模型的改进版本中作为一个基本输入。

英文摘要:

We scrutinize various holographic estimations of the deconfinement temperature within the bottom-up AdS/QCD models. A special emphasis is put on the recent idea of isospectral potentials in the holographic approach. It is demonstrated that different models from an isospectral family (i.e., the models leading to identical predictions for the spectrum of hadrons with fixed quantum numbers) result in different predictions for the deconfinement temperature. This difference is found to be quite small in the scalar glueball channel but very large in the vector meson channel which is often used for fixing parameters of holographic models. The observed stability in the former case clearly favors the choice of the glueball channel for thermodynamic predictions in AdS/QCD models, with the scalar glueball trajectory being taken from lattice simulations and used as a basic input in improved versions of the Soft Wall holographic model.

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