论文标题
相对论流体动力学在电磁场存在下自旋
Relativistic hydrodynamics with spin in the presence of electromagnetic fields
论文作者
论文摘要
我们将经典的相位空间分布函数扩展到包括旋转和电磁场耦合，并得出电荷电流，能量 - 能量张量和自旋张量的修饰的本构关系。由于耦合，新的张量可以对其完美的流体进行校正，并使背景和自旋流体方程相互通信。我们研究了与高能重型离子碰撞相关的特殊情况，包括无巴龙的物质和较大的质量限制。使用Bjorken对称性，我们发现自旋极化随着磁场的增加而增加，对于最初的阳性重度化学电位而言。在此框架中得出的校正可能有助于解释在lambda超子中观察到的分裂旋转极化测量。
We extend the classical phase-space distribution function to include the spin and electromagnetic fields coupling and derive the modified constitutive relations for charge current, energy-momentum tensor, and spin tensor. Because of the coupling, the new tensors receive corrections to their perfect fluid counterparts and make the background and spin fluid equations of motion communicate with each other. We investigate special cases which are relevant in high-energy heavy-ion collisions, including baryon free matter and large mass limit. Using Bjorken symmetries, we find that spin polarization increases with increasing magnetic field for an initially positive baryon chemical potential. The corrections derived in this framework may help to explain the splitting observed in Lambda hyperons spin polarization measurements.
