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arXiv 1305.3296hep-ph
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有限温度下轴对称性的恢复及其与手征对称性恢复和解除禁闭的可能关系

Restoration of axial symmetry and its possible relation with restoration of chiral symmetry and deconfinement at finite temperature

M. C. Ruivo, Pedro Costa, C. A. de Sousa

摘要:

在具有U $_A$(1)反常的SU(2)Polyakov-Nambu-Jona-Lasinio(PNJL)模型框架下,研究了有限温度下以解除禁闭和恢复手征对称性以及轴对称性为特征的相变.在普通PNJL模型及其扩展的Polyakov-Nambu-Jona-Lasinio(EPNJL)模型的框架下,分析了相变的热力学性质、拓扑磁化率、介子谱,特别是轴向和手征伙伴的收敛性.后者包括手征对称性的恢复和解除禁闭之间的纠缠。

英文摘要:

The phase transitions characterized by deconfinement and restoration of chiral symmetry as well as the restoration of axial symmetry, at finite temperature, are investigated in the framework of SU(2) Polyakov-Nambu-Jona-Lasinio (PNJL) models with the U$_A$(1) anomaly. The thermodynamics of the phase transitions, the topological susceptibility, the meson spectrum, and, in particular, the convergence of axial and chiral partners are analyzed, in the framework of the ordinary PNJL model and in its extension, the entangled Polyakov-Nambu-Jona-Lasinio (EPNJL) model. The latter incorporates entanglement between restoration of chiral symmetry and deconfinement.

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