论文标题
在有限温度和磁场上施加辐射物质的剪切粘度
Shear Viscosity of hadronic matter at finite temperature and magnetic field
论文作者
论文摘要
我们使用线性sigma模型在温度和磁场的存在下计算辐射物质的传输系数。在放松时间近似中，我们估计熵密度$η/s $上的剪切粘度。在存在磁场的情况下，通过$ s $ -matrix方法评估了黑龙的点状相互作用速率，以获得温度和磁场依赖性弛豫时间。我们观察到，在磁场存在下，传输系数是各向异性的。我们通过结合估计的松弛时间来计算温度和磁场依赖性各向异性剪切粘度系数。在存在磁场的情况下，粘度在熵密度上的值低于在热介质中其值的值。还讨论了剪切粘合系数的垂直成分的行为。我们考虑了这项工作中平均场效应的温度依赖性强子肿块。
We calculate the transport coefficient of hadronic matter in the presence of temperature and magnetic field using the linear sigma model. In the relaxation time approximation, we estimate the shear viscosity over entropy density $η/s$. The point-like interaction rates of hadrons are evaluated through the $S$-matrix approach in the presence of a magnetic field to obtain the temperature and magnetic field-dependent relaxation time. We observe that the transport coefficients are anisotropic in the presence of the magnetic field. We calculate the temperature and magnetic field-dependent anisotropic shear viscosity coefficients by incorporating the estimated relaxation time. The value of viscosity over entropy density is lower in the presence of a magnetic field than the value of it in a thermal medium. The behavior of the perpendicular components of the shear-viscous coefficient is also discussed. We consider the temperature-dependent hadron masses from mean-field effects in this work.
