论文标题
从剪切应力产生张量化极化
Generating Tensor Polarization from Shear Stress
论文作者
论文摘要
我们得出了在流体动力框架中大量自旋-1颗粒系统的张量极化的表达。从基于Wigner-unction形式主义的量子动力学理论开始，我们采用了一种修改的时刻方法，该方法还考虑了所有自由度的自由度。结果表明，未充电的流体的张量极化由剪切压力张量确定。为了量化这种新颖的极化效果，我们提供了一个公式，该公式可用于相对论重离子碰撞中矢量 - 膜自旋对齐的数值计算。
We derive an expression for the tensor polarization of a system of massive spin-1 particles in a hydrodynamic framework. Starting from quantum kinetic theory based on the Wigner-function formalism, we employ a modified method of moments which also takes into account all spin degrees of freedom. It is shown that the tensor polarization of an uncharged fluid is determined by the shear-stress tensor. In order to quantify this novel polarization effect, we provide a formula which can be used for numerical calculations of vector-meson spin alignment in relativistic heavy-ion collisions.
