The shear viscosity coefficient(η)is an important parameter for quantitatively describing the degree of fluid dynamics dissipation of QCD under an external magnetic field background.It is worth noting that theηis very sensitive to the phase transition characteristics in magnetized QCD media.The NJL(Nambu Jona Lasinio)model with anomalous magnetic moment in magnetized QCD media is uti-lized to systematically study the characteristics of shear viscosity coefficient during chiral first-order phase transition and critical phase transition respectively.The results indicate that the four compo-nents of the shear viscosity coefficient of the magnetized background increases with increasing temper-ature.For first-order phase transitions,the shear viscosity coefficient exhibits discontinuous changes and the research results are consistent with those of lattice QCD theory.
关键词
NJL模型/剪切粘滞系数/反常磁矩/相变
Key words
NJL model/shear viscosity coefficient/anomalous magnetic moments/inverse magnetic catalysis/phase transition
维普
万方数据