Spin polarization dynamics in the Bjorken-expanding resistive MHD background

TL;DR

This paper investigates how spin polarization evolves in a resistive magnetohydrodynamic background with external electric fields at different collision energies, revealing the electric field's significant influence on the dynamics.

Contribution

It provides the first numerical analysis of spin polarization evolution in a Bjorken-expanding resistive MHD background with external electric fields at high collision energies.

Findings

Electric field significantly affects spin polarization dynamics.

Expansion and dissipation compete influenced by electric fields.

Novel numerical results on spin evolution in resistive MHD.

Abstract

Evolution of spin polarization in the presence of external electric field is studied for collision energies $\sqrt{s_{\rm NN}}=27\,{\rm GeV}$ and $\sqrt{s_{\rm NN}}=200\,{\rm GeV}$. The numerical analysis is done in the perfect-fluid Bjorken-expanding resistive magnetohydrodynamic background and novel results are reported. In particular, we show that the electric field plays a significant role in the competition between expansion and dissipation.