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Physical Review C 57 (1998) 1522-1524
Influence of pion-delta-hole configuration on the $\rho$ meson mass spectrum in dense hadronic matter
G. Chanfray1, P. Schuck2

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 $500 MeV$ 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 $1 GeV/u$.
1 :  IPNL - Institut de Physique Nucléaire de Lyon
2 :  LPSC - Laboratoire de Physique Subatomique et de Cosmologie
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