Perspectives of e+e− production in pp, pd and pBe reactions at SIS energies Original Research Article

We study dilepton production from pp, pd and pBe collisions from 1–5 GeV including the π0, η, ω and Δ Dalitz decays, direct decays of vector mesons (ρ, ω) as well as subthreshold ρ production via baryonic resonances (e.g. View the MathML source). Our calculations compare rather well with the pp and pd data from the DLS collaboration, however, overestimate slightly the ‘old’ pBe data from that group. Furthermore, detailed predictions for differential dilepton spectra at SIS energies are made with a high mass resolution that can be controlled experimentally by the HADES collaboration in near future.