The strong coupling of rho meson to the nucleon produces s and p wave rho meson nucleon (_ΡN) resonances. In a nucleus, the _ΡN resonance-hole polarization generates the optical potential or self-energy for the rho meson. The scattering of rho meson due to this potential provides valuable informations about the _ΡN resonance dynamics in a nucleus. To investigate it, we use this potential to calculate the mass distribution spectrum for the Ρ meson produced coherently in the proton nucleus reaction. The cross sections arising due to s and p wave _ΡN resonances have been presented. The coherent and incoherent contributions to the cross sections due to these resonances are compared. In addition, the calculated results due to nonrelativistic and relativistic Ρ meson self-energy are illustrated.