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Vector mesons containing light quarks are thought to have their massesreduced in dense nuclear matter, sacrificing some of their energy to the scalarfield which becomes appreciable at finite baryon density. Model calculationsfind masses which fall by a couple tens of percents in normal nuclear matter,and by several hundred MeV in dense matter. We estimate the collision rate forrho mesons in such a scenario and at finite temperature. Compared to itsfree-mass value, the collision rate changes by nearly a factor of two bothabove and below, depending on the density. This collision broadening effectcould be important for estimates of low-mass dilepton production in heavy-ioncollisions.Comment: 8 pages LaTeX, 2 PostScript figure

Collision broadening of the ρ meson in a dropping mass scenario