Abstract
Detailed predictions for dilepton production from p A reactions at SIS energies are presented within a semiclassical BUU transport model that includes the off-shell propagation of vector mesons nonperturbatively and calculates the width of the vector mesons dynamically. Different scenarios of in-medium modifications of vector mesons, such as collisional broadening and dropping vector-meson masses, are investigated and the possibilities for an experimental observation of in-medium effects in p A reactions at 1–4 GeV are discussed for a variety of nuclear targets.
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