Photon radiation induced by rescattering in strong-interacting medium with a magnetic field

TL;DR

This study analyzes how magnetic fields influence photon emission and energy loss of quark jets in quark-gluon plasma during heavy-ion collisions, revealing a slight suppression in photon yield.

Contribution

It provides the first quantitative analysis of photon radiation suppression due to magnetic fields in a quark-gluon plasma using the Gyulassy-Levai-Vitev formalism.

Findings

Photon radiation is slightly suppressed over a broad energy range.

Electromagnetic energy loss of jets decreases moderately.

Results aid in understanding electromagnetic signals in high-energy nuclear collisions.

Abstract

The photon radiation induced by rescattering in a magnetized medium is investigated in relativistic heavy-ion collisions. Within the high-energy limit, the photon emission rate and the associated electromagnetic energy loss are derived using the Gyulassy-Levai-Vitev formalism at first order in opacity, for a quark jet propagating a quark-gluon plasma under a background magnetic field. Quantitative analysis shows a slight suppression of the overall photon radiation over a broad range of jet energies in this process. This reduction in photon yield consequently leads to a moderate decrease in the electromagnetic energy loss of the jet. Our results contribute to a better understanding of the electromagnetic properties of strongly interacting matter in high-energy nucleus-nucleus collisions and motivate experimental comparison of photon yields from quark-gluon plasma with similar properties but distinct magnetic field strengths.