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arXiv 0907.1972hep-ph
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SU(3)PNJL模型中的标量-赝标介子谱

Scalar-pseudoscalar meson spectrum in SU(3) PNJL model

Pedro Costa, M. C. Ruivo, C. A. de Sousa, H. Hansen, W. M. Alberico

摘要:

我们研究了热介质中介子性质的改变,并考虑使用介子模作为工具来分析SU(3)Polyakov-Nambu-Jona-Lasinio(PNJL)模型中手征对称性和轴对称性的恢复。结果导致的结论是,Polyakov循环的影响是根本的再生晶格的结果。结果表明,PNJL模型中手征对称性的恢复发生在一个较小的温度范围内(小于Nambu-Jona-Lasinio(NJL)模型中的温度范围),拓扑磁化率很好地再现了$T/T_c^χ\approx 1.0$附近的晶格结果.

英文摘要:

We investigate the modifications of mesonic properties in a hot medium having in mind to use the mesonic modes as a tool to analyze the restoration of chiral and axial symmetries in the context of the SU(3) Polyakov--Nambu--Jona-Lasinio (PNJL) model. The results lead to the conclusion that the effects of the Polyakov loop are fundamental for reproducing lattice findings. It is found that the restoration of chiral symmetry in the PNJL model occurs in a small range of temperature (smaller that in the Nambu--Jona-Lasinio (NJL)), and the topological susceptibility reproduces well the lattice results around $T/T_c^χ\approx 1.0$.

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