A study on the isolated photon production in nuclear collisions at the CERN-LHC energies

TL;DR

This paper analyzes prompt photon production in high-energy nuclear collisions at the LHC using color dipole models, comparing results with experimental data to understand collision geometries.

Contribution

It introduces an analysis of prompt photon production at LHC energies within the color dipole framework, incorporating updated phenomenological models.

Findings

Prompt photon production shows distinct scaling behaviors in AA collisions.

Color dipole formalism effectively describes photon transverse momentum distributions.

Results align with measurements from ALICE, ATLAS, and CMS.

Abstract

An analysis of prompt photon production in high energy nuclear collisions at the LHC energy regime is performed within the parton saturation picture taking into account the updated phenomenological color dipole models. The results are confronted with the measurements made by the ALICE, ATLAS, and CMS experiments in terms of photon transverse momentum at different rapidity bins. As a result, we show that the prompt photon production exhibits distinct scalings in $AA$ events associated to geometrical properties of the collision and can be properly addressed in the color dipole formalism.