Influence of pion-delta-hole configuration on the rho meson mass spectrum in dense hadronic matter

Abstract

We discuss medium modification of the rho meson originating from its coupling to in medium quasi-pions and delta-hole states. This medium effect leads to a marked structure of the rho meson strength function in the $500MeV$ invariant mass region. We suggest that this effect may provide an explanation of the structure observed by the DLS collaboration in the $Ca+Ca/C+C$ ratio at $1GeV/u$.

Comments: 5 pages and 3 figures, Latex