The effect of electro-magnetic formfactors on dilepton production off pp-collisions

Abstract

We investigate the effect of the electric formfactor on dilepton production off pp-collisions. In the model we use, the formfactor is separated in a pion-cloud contribution and a Vector Meson Dominance part. We find that the dilepton spectrum is hardly affected by the pion-cloud part, but significantly by the VMD contribution. We point out that data with sufficient resolution would provide a crucial test of the validity of VMD for the nucleon formfactor in the timelike region.

Comments: 11 pages Revtex with 2 postscript figures, to appear in Physics Letters B