Matter induced $ρ$-$δ$ mixing : a source of dileptons

We study the possibility of $ρ-δ$ 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 $δ$. We calculate the cross section for dilepton production through the mixing process and we compare its size with that of $π-π$ annihilation. In-medium masses and mixing angles are also calculated.

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