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arXiv · 2109.15301

Spin Polarization Formula for Dirac Fermions at Local Equilibrium

Yu-Chen Liu·Xu-Guang Huang
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Abstract

We derive a Cooper-Frye type spin polarization formula for Dirac fermions at local thermal equilibrium described by a grand canonical ensemble specified by temperature, fluid velocity, chemical potential, and spin potential. We discuss the physical meaning of different contributions to spin polarization and compare them with previous works. The present formula provides machinery to convert the spin potential computed in, e.g., relativistic spin hydrodynamics to the spin polarization observable in, e.g., heavy-ion collisions.

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Yu-Chen Liu, Xu-Guang Huang. 2021-09-30. Spin Polarization Formula for Dirac Fermions at Local Equilibrium. https://doi.org/10.1007/s11433-022-1903-8

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