论文标题
在有限温度下的线性sigma模型中的HADRONIC运输系数
Hadronic transport coefficients from the linear sigma model at finite temperature
论文作者
论文摘要
我们研究了在有限温度下计算准粒子理论的转运系数的一般框架。然后，使用线性Sigma模型（LSM）计算HADRONIC传输系数。在松弛时间近似（RTA）中评估了熵密度（$ζ/s $）的散装粘度，并在RTA中获得了特定的剪切粘度（$η/s $）和静态电导率（$σ_{el}/t $）均可在RTA中获得RTA和使用功能变化方法。结果显示了与相互作用场的中等质量质量质量的标量 - 等轴心强生真空质量的不同值。讨论了LSM在均衡中进行强烈相互作用物质研究的优势和局限性，并将结果与文献中的其他结果进行了比较。
We investigate general frameworks for calculating transport coefficients for quasiparticle theories at finite temperature. Hadronic transport coefficients are then computed using the linear sigma model (LSM). The bulk viscosity over entropy density ($ζ/s$) is evaluated in the relaxation time approximation (RTA) and the specific shear viscosity ($η/s$) and static electrical conductivity ($σ_{el}/T$) are both obtained in the RTA and using a functional variational approach. Results are shown for different values of the scalar-isoscalar hadron vacuum mass with in-medium masses for the interacting fields. The advantages and limitations of the LSM for studies of strongly interacting matter out of equilibrium are discussed and results are compared with others in the literature.
