# Hard dilepton production from a weakly magnetized hot QCD medium

## TL;DR

This paper calculates the rate of hard dilepton production in a hot QCD medium with a weak magnetic field, using one-loop photon self-energy and considering quasiparticle modes, showing marginal magnetic field effects.

## Contribution

It introduces a first-order perturbative calculation of dilepton production in a weakly magnetized QCD medium, incorporating quasiparticle modes from resummed quark propagators.

## Key findings

- Magnetic field causes marginal correction to dilepton rate.
- Four quasiparticle modes influence the production rate.
- First-order magnetic correction is computed and found to be small.

## Abstract

We have computed the hard dilepton production rate from a weakly magnetized deconfined QCD medium within one-loop photon self-energy by considering one hard and one thermomagnetic resummed quark propagator in the loop. In the presence of the magnetic field, the resummed propagator leads to four quasiparticle modes. The production of hard dileptons consists of rates when all four quasiquarks originating from the poles of the propagator individually annihilate with a hard quark coming from a bare propagator in the loop. Besides these, there are also contributions from a mixture of pole and Landau cut part. In weak field approximation, the magnetic field appears as a perturbative correction to the thermal contribution. Since the calculation is very involved, for a first effort as well as for simplicity, we obtained the rate up to first order in the magnetic field, i.e., ${\cal O}[(eB)]$, which causes a marginal improvement over that in the absence of magnetic field.