Finite pion width effects on the rho-meson and di-lepton spectra

Abstract

Within a field theoretical model where all damping width effects are treated self-consistently we study the changes of the spectral properties of rho-mesons due to the finite damping width of the pions in dense hadronic matter at finite temperature. The corresponding effects in the di-lepton yields are presented. Some problems concerning the self consistent treatment of vector or gauge bosons are discussed.

Comments: Invited talk given at International Workshop "Gross properties of Nuclei and Nuclear Exitations", Hirschegg, Austria, 16-22.01.2000, Latex, 7 pages