论文标题
来自动力学理论的相对论耗散性自旋流体动力学具有非局部碰撞项
Relativistic dissipative spin hydrodynamics from kinetic theory with a nonlocal collision term
论文作者
论文摘要
我们从动力学理论中得出相对论耗散性自旋流体动力学，其使用矩的方法具有非局部碰撞项。在此框架中，自旋张量的组件是遵守松弛型方程的动力变量。我们发现相应的放松时间取决于碰撞项的局部部分，而非局部部分则有助于这些运动方程式中的Navier-Stokes术语。自旋松弛时间尺度与通常的耗散电流相当。最后，Pauli-Lubanski载体的Navier-Stokes极限接受与流体的剪切张量成正比的贡献，这意味着在重离子碰撞中观察到的Hadron的极化会受到耗散作用的影响。
We derive relativistic dissipative spin hydrodynamics from kinetic theory featuring a nonlocal collision term using the method of moments. In this framework, the components of the spin tensor are dynamical variables which obey relaxation-type equations. We find that the corresponding relaxation times are determined by the local part of the collision term, while the nonlocal part contributes to the Navier-Stokes terms in these equations of motion. The spin relaxation time scales are comparable to those of the usual dissipative currents. Finally, the Navier-Stokes limit of the Pauli-Lubanski vector receives contributions proportional to the shear tensor of the fluid, which implies that the polarization of hadrons observed in heavy-ion collisions is influenced by dissipative effects.
