Pushing the hybrid approach to low beam energies with dynamic initial conditions from hadronic transport

2025/07/25 by Renan Hirayama, Góes-Hirayama, Renan, J.-P. Egger +6 · 3 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Magnetic confinement fusion research

paper · pdf · doi:10.48550/arxiv.2507.19389

Abstract

While hybrid approaches of relativistic hydrodynamics+transport have been well established for the dynamical description of heavy-ion collisions at high beam energies, moving to lower beam energies is challenging. In this work, we propose dynamic initial conditions for the viscous hydrodynamic evolution in heavy-ion collisions at low to intermediate beam energies. They are comprised of core hadrons based on the local energy density during the pre-equilibrium hadronic evolution. The SMASH-vHLLE hybrid approach is then applied to lower beam energies, achieving good agreement with measured bulk observables between √(s_NN) = 3 and 9.1 GeV, thus providing guidance for measurements in STAR-BES and CBM at FAIR.

Cited by

• Toward a Unified Understanding of the Dense Matter Equation of State
• Imprints of dynamic fluidization on dilepton production
• SMASH: Results from hadronic transport for heavy-ion collisions at high densities

Related

• Transport-based initial conditions for heavy-ion collisions at finite densities
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• Pre-equilibrium evolution effects on heavy-ion collision observables
• Extension of the integrated hydrokinetic model to nuclear collision energies relevant for the RHIC Beam-Energy Scan program and the research program at GSI-FAIR
• Relativistic Viscous Hydrodynamics for High Energy Heavy Ion Collisions