Spin Polarization Formula for Dirac Fermions at Local Equilibrium
Nuclear Theory
2022-06-06 v3 High Energy Physics - Phenomenology
Nuclear Experiment
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.
Keywords
Cite
@article{arxiv.2109.15301,
title = {Spin Polarization Formula for Dirac Fermions at Local Equilibrium},
author = {Yu-Chen Liu and Xu-Guang Huang},
journal= {arXiv preprint arXiv:2109.15301},
year = {2022}
}
Comments
V3: 9 pages, no figure