Imprints of dynamic fluidization on dilepton production

¹ Helmholtz Forschungsakademie Hessen für FAIR (HFHF), Germany
² Frankfurt Institute for Advanced Studies, Germany
³ Institut für Theoretische Physik, Goethe Universität, Germany
⁴ Faculty of Science, P.J. Safárik University, Slovakia
⁵ Faculty of Nuclear Sciences and Physical Engineering, Czech Technical University in Prague
⁶ GSI Helmholtzzentrum für Schwerionenforschung, Germany

^* e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

Published online: 17 April 2026

Abstract

We present a newly developed hybrid hadronic transport + hydrodynamics framework geared towards heavy ion collisions (HICs) at low to intermediate beam energies, and report on the resulting excitation function of dileptons. In this range of energies, it is unclear how to properly initialize the hydrodynamic evolution. Due to the cumulative electromagnetic radiation throughout the collision, dilepton observables are sensitive to the initial condition. In this work, we study how the dilepton "thermometer" is affected by employing dynamical initial conditions, in contrast to the traditional fixed-time approach.