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We present a study of the reaction $\pi^-p \to ne^+e^-$ for$\sqrt{s}=1.49\,\textrm{GeV}$, including non-resonant Born terms andcontributions of the $N(1440)$, $N(1520)$, $N(1535)$ resonances ($R$), using aneffective-Lagrangian model, which we extended by a phenomenological phasefactor at the $RN\rho$ vertex function. We give predictions for both thedifferential cross section $d\sigma/dm$ and the spin density matrix elements ofthe virtual photon that decays into the lepton pair. In the studied energyrange, the cross section is dominated by the Born and $N(1520)$ contributions.

Role of baryon resonances in the $\pi^-p \to ne^+e^-$ reaction within an effective-Lagrangian model