Work

Spin polarization of fermions at local equilibrium: Second-order gradient expansion

Year: 2024

Type: article

Abstract: We present a calculation of the spin polarization of spin-1/2 fermions in a relativistic fluid at local thermodynamic equilibrium at the second order in the gradient expansion, including second-order derivatives. The second-order derivative terms vanish if the local equilibrium hypersurface is the hyperplane t = const in the collision center-of-mass frame. However, since the freeze-out hypersurface has a nontrivial space-time structure, these terms may result in a nonvanishing contribution to the spin polarization, whose magnitude needs to be assessed with numerical computations. Published by the American Physical Society 2024

Source: Physical Review C

DOI: 10.1103/physrevc.110.064908

Authors: Xin-Li Sheng, Francesco Becattini, Xu-Guang Huang, Zhong-Hua Zhang

Institutions: Istituto Nazionale di Fisica Nucleare, Sezione di Firenze, University of Florence, National Natural Science Foundation of China, Fudan University

Language: English

Topic: High-Energy Particle Collisions Research

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid