Effects of a background magnetic field on dilepton radiation

TL;DR

This paper investigates how dilepton radiation can serve as a magnetometer for the quark-gluon plasma by analyzing the impact of magnetic fields on dilepton production and flow in heavy-ion collisions.

Contribution

It introduces a method to use dilepton spectra and elliptic flow as probes for magnetic fields in quark-gluon plasma, with detailed simulations of Au+Au collisions.

Findings

Dilepton elliptic flow is highly sensitive to magnetic field strength.

The study provides a realistic simulation framework for dilepton production in heavy-ion collisions.

Magnetic fields significantly influence thermal dilepton spectra.

Abstract

We explore the feasibility of using dilepton radiations as a QGP magnetometer. We calculate the dilepton production rate in the presence of a time-dependent magnetic field typically found in heavy-ion collisions. We compute the thermal dilepton spectra from Au+Au collisions at $\sqrt s$ = 19.6 GeV BES energy -- using a realistic (3+1)-dimensional multistage hydrodynamic simulation. We find the thermal dilepton elliptic flow to be very sensitive to the strength of the magnetic field.