Electromagnetic radiation from Quark-Gluon Plasma at finite baryon density

¹ Department of Physics, McGill University, 3600 University Street, Montreal, Québec H3A 2T8, Canada
² Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37240, USA
³ Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA
⁴ Department of Physics and Astronomy, Wayne State University, Detroit, Michigan 48201, USA

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Published online: 17 April 2026

Abstract

Using the Bayesian calibrated iEBE-MUSIC framework, we compute the production of electromagnetic radiation from hot hadronic matter at finite baryon density. Results for thermal photon and thermal dilepton yields are obtained by folding in-medium emission rates with posterior-sampled backgrounds evolved hydrodynamically. We consider different photon sources and analyze the collision-energy dependence of the thermal-to-prompt photon ratio. The sensitivity of the dilepton spectra to the pre-equilibrium stage is explored by considering different initialization procedures. Finally, we examine the impact on dilepton spectra of choosing parameter sets stemming from different Bayesian data analyses.