论文标题
粒子极化，自旋张量和相对论系统中的wigner分布
Particle polarization, spin tensor and the Wigner distribution in relativistic systems
论文作者
论文摘要
已知粒子自旋极化既可以与旋转（角动量）和许多粒子系统的磁化相关。然而，在相对论动力学理论的最常见表述中，自由度的自由度仅作为堕落因子乘以相位空间分布。因此，重要的是要开发理论工具来允许对颗粒的自旋极化做出预测，这些工具可以直接面对实验数据。在本文中，我们讨论了相对论自旋张量与粒子自旋极化之间的联系，并阐明了Wigner函数与平均极化之间的连接。我们的结果可能对于对生产的Hadron的自旋极化的重离子数据的理论解释可能很有用。
Particle spin polarization is known to be linked both to rotation (angular momentum) and magnetization of a many particle system. However, in the most common formulation of relativistic kinetic theory, the spin degrees of freedom appear only as degeneracy factors multiplying phase-space distributions. Thus, it is important to develop theoretical tools that allow to make predictions regarding the spin polarization of particles, which can be directly confronted with experimental data. Herein, we discuss a link between the relativistic spin tensor and particle spin polarization, and elucidate the connections between the Wigner function and average polarization. Our results may be useful for theoretical interpretation of heavy-ion data on spin polarization of the produced hadrons.
