Bremsstrahlung photons from stopping in heavy-ion collisions

TL;DR

This paper investigates bremsstrahlung photon emission caused by charge stopping in ultrarelativistic heavy-ion collisions, proposing it could be detected with future LHC detectors like ALICE-3 to explore charge dynamics.

Contribution

It introduces the concept of bremsstrahlung photons from charge stopping in heavy-ion collisions and discusses their potential detectability with upcoming detector technology.

Findings

Bremsstrahlung photons are significant at low transverse momentum and forward rapidity.

Detection may be feasible with next-generation LHC detectors like ALICE-3.

Provides motivation for future experimental measurements.

Abstract

We examine the spectrum of bremsstrahlung photons that results from the stopping of the initial net charge distributions in ultrarelativistic nucleus-nucleus collisions at the CERN Large Hadron Collier (LHC). This effect has escaped detection so far since it becomes sizable only at very low transverse momentum and at sufficiently forward rapidity. We argue that it may be within reach of the next-generation LHC heavy-ion detector ALICE-3 that is currently under study, and we comment on the physics motivation for measuring it.