We study the possibility of $\rho$-$\delta$ mixing via N-$N$ excitations in dense nuclear matter. This mixing induces a peak in the dilepton spectra at an invariant mass equal to that of the $\delta .$ We calculate the cross section for dilepton production through the mixing process and we compare its size with that of $\pi$-$\pi$ annihilation. In-medium masses and mixing angles are also calculated.

• Received 8 February 2000

DOI:https://doi.org/10.1103/PhysRevC.61.051901