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

Mar, 2012
15 pages
Published in:
  • Eur.Phys.J.A 48 (2012) 111,
  • Eur.Phys.J.A 48 (2012) 150 (erratum)
e-Print:
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2012201520182021202402468101214
Abstract: (arXiv)
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 ρ\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.
Note:
  • 18 pages, 14 figures. v3: as published in EPJ
  • p p: inclusive reaction
  • p nucleus: nuclear reaction
  • deuteron
  • niobium
  • dilepton: production
  • transport theory
  • resonance: model
  • cross section: energy dependence
  • meson: electromagnetic decay
  • form factor