Predictions for photon-jet correlations at forward rapidities in heavy-ion collisions

TL;DR

This paper investigates photon-jet correlations at forward rapidities in heavy-ion collisions, incorporating saturation and Sudakov effects to understand jet-medium interactions and energy loss in the quark-gluon plasma.

Contribution

It introduces a novel approach combining saturation, Sudakov effects, and in-medium evolution for photon-jet studies at forward rapidities in heavy-ion collisions.

Findings

Gluon saturation effects significantly influence azimuthal correlations.

Nuclear modification ratios reveal early-time saturation impacts.

Results inform future experimental measurements at ALICE FoCal.

Abstract

In this work, we study for the first time jet-medium interactions in heavy-ion collisions with introduction of saturation and Sudakov effects with parameters tuned for upcoming forward calorimeter acceptances in experiments, in particular the ALICE FoCal detector. We focus on $\gamma +$jet correlations by taking into account in-medium parton evolution using the BDIM equation that describes jet interactions with the quark-gluon plasma (QGP) combined with vacuum-like emissions (VLE). We systematically introduce the early time gluon saturation dynamics through the small-$x$ Improved Transverse Momentum Dependent factorization (ITMD). For our purpose, we use Monte Carlo programs KATIE and TMDICE to generate hard events and in-medium parton evolution, respectively. We present results of azimuthal correlations and nuclear modification ratios to gauge the impact of the gluon saturation effects at early time for the in-medium jet energy loss.