Impact parameter dependence of the effect of background field on coupling constant in heavy ion collisions

TL;DR

This paper studies how the impact parameter influences the background field's effect on the coupling constant in photon-lepton processes during heavy-ion collisions, revealing significant dependence.

Contribution

It introduces a detailed analysis of impact parameter dependence on the background field's effect in heavy-ion collision processes, which was not previously characterized.

Findings

The effect varies significantly with impact parameter.

Background field influence is substantial during peripheral collisions.

Numerical estimates quantify the impact parameter dependence.

Abstract

We investigated the impact parameter dependence of the background field's effect on the coupling constant of the $\gamma \gamma \rightarrow l^{+} l^{-} \gamma$ process in heavy-ion collisions. The peripheral electric fields of heavy ions collide, and after photon annihilation into lepton pairs, the subsequent emission of radiation photons will be affected by the background field. Numerical estimates indicate that the dependence of this effect on the impact parameter is significant during this process.