Dilepton production at SIS energies with the GiBUU transport model

TL;DR

This paper uses the GiBUU transport model to simulate dilepton production in nucleus-nucleus collisions at SIS energies and compares the results to experimental data, emphasizing the importance of rho meson-resonance couplings.

Contribution

It introduces a resonance-model approach within GiBUU to analyze dilepton spectra and highlights the critical role of rho meson-baryonic resonance couplings.

Findings

Dilepton spectra are sensitive to rho meson-resonance couplings.

Comparison with HADES data supports the resonance-model approach.

Interpretation of dilepton data depends on meson-resonance interaction assumptions.

Abstract

We present dilepton spectra from nucleus-nucleus collisions at SIS energies, which were simulated with the GiBUU transport model in a resonance-model approach. These spectra are compared to the data published by the HADES collaboration. We argue that the interpretation of dilepton spectra at SIS energies critically depends on the couplings between the {\rho} meson and the baryonic resonances.