$\rho N$ resonance dynamics in the proton nucleus reaction

TL;DR

This paper investigates the dynamics of rho meson resonances in proton-nucleus reactions by calculating the rho meson mass distribution spectrum, analyzing resonance contributions, and comparing relativistic and non-relativistic models.

Contribution

It introduces a detailed analysis of rho N resonance effects on rho meson production spectra in proton-nucleus reactions, including both coherent and incoherent contributions.

Findings

Resonance contributions significantly affect the rho meson mass spectrum.

Comparison shows differences between relativistic and non-relativistic self-energy models.

The study provides insights into rho N resonance dynamics within nuclear matter.

Abstract

The strong coupling of rho meson to the nucleon produces $s$ and $p$ wave rho meson nucleon $(\rho N)$ resonances. In a nucleus, the $\rho N$ 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 $\rho N$ resonance dynamics in a nucleus. To investigate it, we use this potential to calculate the mass distribution spectrum for the $\rho$ meson produced coherently in the proton nucleus reaction. The cross sections arising due to $s$ and $p$ wave $\rho N$ 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 non-relativistic and relativistic $\rho$ meson self-energy are illustrated.