Vector meson propagation in dense matter

Abstract

The properties of vector mesons in nuclear matter are discussed. Results for the momentum dependence of the $\rho$-meson self energy in matter due to $\rho N$ interactions are presented, and consequences for the production rate of $e^{+}{e}^{-}$ pairs in hot and dense matter are discussed. I also examine the constraints imposed by elementary processes on the widths of $\rho$ and $\omega$ mesons in nuclear matter, and conclude that in recent models the in-medium widths of these mesons are overestimated.

Comments: 18 pages, 9 EPS figures, uses article.sty, epsfig.sty, sprocl.sty, talk given at the APCTP Workshop on Astro-Hadron Physics, Seoul, Korea, 25-31 October 1997, numerical values for \omega-n scatt. ampl. corrected, fig. 7 replaced