Finite temperature effect in infrared-improved AdS/QCD model with back reaction of bulk vacuum

Finite temperature effect in infrared-improved AdS/QCD model with back reaction of bulk vacuum
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具有本体真空逆反应的红外改进 AdS/QCD 模型中的有限温度效应

DOI:
10.1088/1674-1137/40/6/063101
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发表时间:
2014-04
期刊:
影响因子:
3.6
通讯作者:
Wu Yue Liang
Wu Yue Liang
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Cui Ling Xiao;Fang Zhen;Wu Yue Liang

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基于一个对共振标量、赝标量、矢量和轴矢量介子的质量谱具有一致性预测的IR改进的软壁AdS/QCD模型,我们研究了它的有限温度效应.通过对介子谱函数的分析,用Breit-Wigner形式对介子谱函数进行拟合,对介子的临界温度进行了分析。考虑了体真空的背反应效应,在背反应改进作用量的基础上计算了共振介子的热质谱函数。合理的熔化温度为Tc = 150 ± 7 MeV,这与最近的晶格QCD模拟结果一致。
Based on an IR-improved soft-wall AdS/QCD model for mesons, which provides a consistent prediction for the mass spectra of resonance scalar, pseudoscalar, vector and axial-vector mesons, we investigate its finite temperature effect. By analyzing the spectral function of mesons and fitting it with a Breit-Wigner form, we perform an analysis for the critical temperature of mesons. The back-reaction effects of bulk vacuum are considered and the thermal mass spectral function of resonance mesons is calculated based on the back-reaction improved action. A reasonable melting temperature is found to be Tc ≈ 150 ± 7 MeV, which is consistent with the recent results from lattice QCD simulations.
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