Dilepton production in proton-induced reactions at SIS energies with the GiBUU transport model

Abstract

We present dilepton spectra from p+p, d+p and p+Nb reactions 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 and DLS collaborations. It is shown that the $\rho$ spectral function includes non-trivial effects already in elementary reactions, due to production via baryon resonances, which can yield large contributions to the dilepton spectrum. Dilepton spectra from nuclear reactions in the energy range of the HADES experiment are thus found to be sensitive also to properties of nucleon resonances in the nuclear medium.

18 pages, 14 figures. v3: as published in EPJ

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• Subthreshold Xi- Production in Collisions of p(3.5 GeV)+Nb
• Analysis of pion production data measured by HADES in proton-proton collisions at 1.25 GeV
• Associate K^0 production in p+p collisions at 3.5 GeV: The role of Delta(1232)++
• Dilepton production at SIS energies with the GiBUU transport model
• Dilepton Production in Transport-based Approaches
• Electromagnetic probes in heavy-ion collisions: Messengers from the hot and dense phase
• Vector Meson Spectral Functions in a Coarse-Graining Approach