e+ e- pairs from pi- A reactions: Comment

We calculate dilepton production for the reactions π − C and π − Pb at 1.3 GeV within a semi-classical BUU transport model and compare our results to a previously published calculation. We show that a modified treatment of the ρ -meson production and propagation gives substantially different results. We, furthermore, discuss uncertainties related to the electromagnetic decay of the ρ -meson and the elementary π − N → e + e − X channels.