# Screening masses in strong external magnetic fields

## TL;DR

This study uses lattice QCD simulations to analyze how external magnetic fields influence the magnetic and electric screening masses of the Quark-Gluon Plasma across various temperatures, revealing increasing masses with magnetic field strength and temperature-dependent anisotropy.

## Contribution

First lattice QCD determination of magnetic and electric screening masses in a magnetic field at physical quark masses, exploring their dependence on magnetic field and temperature.

## Key findings

- Screening masses increase with magnetic field strength.
- Dependence on magnetic field weakens at higher temperatures.
- Slight anisotropy observed in magnetic screening mass.

## Abstract

We present results for the (color)magnetic and (color)electric screening masses of the Quark-Gluon Plasma in the presence of an external magnetic field. The screening masses are extracted from the correlators of Polyakov loops, determined by lattice QCD simulations at the physical point. We explore temperatures in the range $200\,\mathrm{MeV}\lesssim T\lesssim 330\,\mathrm{MeV}$ and magnetic field intensities up to $|e|B \sim 1.3\,\mathrm{GeV}^2$. We find that both screening masses are increasing functions of the magnetic field and that the dependence on $B$ becomes weaker for larger temperatures. In the case of the magnetic screening mass a slight anisotropy is also observable.