1203.3557 (Janus Weil et al.)

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

Janus Weil, Hendrik van Hees, Ulrich Mosel

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 collaboration. It is shown that the rho spectral function includes nontrivial 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.

View original: http://arxiv.org/abs/1203.3557