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

Souvik Priyam Adhya; Krzysztof Kutak; Wiesław Płaczek; Martin Rohrmoser; Konrad Tywoniuk

doi:10.1140/epjc/s10052-025-14020-4

2023 Impact factor 4.2

Particles and Fields

Open Access

Eur. Phys. J. C (2025) 85: 343
https://doi.org/10.1140/epjc/s10052-025-14020-4

Regular Article - Theoretical Physics

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

Souvik Priyam Adhya¹^,2, Krzysztof Kutak¹^a, Wiesław Płaczek³, Martin Rohrmoser⁴^,5^,5 and Konrad Tywoniuk⁶

¹ Institute of Nuclear Physics, Polish Academy of Sciences, ul. Radzikowskiego 152, 31-342, Kraków, Poland
² FZU - Institute of Physics of the Czech Academy of Sciences, Na Slovance 1999/2, 182 00, Prague 8, Czechia
³ Faculty of Physics, Astronomy and Applied Computer Science and Mark Kac Center for Complex Systems Research, Jagiellonian University, ul. Lojasiewicza 11, 30-348, Kraków, Poland
⁴ Faculty of Material Engineering and Physics, Cracow University of Technology, ul. Podchorazych 1, 30-084, Kraków, Poland
⁵ Institute of Physics, Jan Kochanowski University, 25-406, Kielce, Poland
⁶ Department of Physics and Technology, University of Bergen, 5007, Bergen, Norway

^a krzysztof.kutak@ifj.edu.pl

Received: 26 September 2024
Accepted: 28 February 2025
Published online: 26 March 2025

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 $γ +$ $\gamma +$ 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.

Present address: Institute of Physics, Jan Kochanowski University, 25-406, Kielce, Poland

© The Author(s) 2025

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