Effects of pseudoscalar-baryon channels in the dynamically generated vector-baryon resonances

TL;DR

This paper investigates how including pseudoscalar-baryon channels affects the properties of vector-baryon resonances, revealing changes in their widths and masses within a coupled channels framework.

Contribution

It introduces the role of pseudoscalar-baryon channels in the dynamical generation of vector-baryon resonances, extending previous models that considered only vector-baryon interactions.

Findings

Pseudoscalar-baryon channels influence resonance widths and masses.

Inclusion of pseudoscalar channels modifies the properties of known baryon resonances.

The study clarifies the coupling effects between different meson-baryon channels.

Abstract

We study the interaction of vector mesons with the octet of stable baryons in the framework of the local hidden gauge formalism using a coupled channels unitary approach, including also the pseudoscalar-baryon channels which couple to the same quantum numbers. We examine the scattering amplitudes and their poles, which can be associated to known $J^P=1/2^-,3/2^-$ baryon resonances, and determine the role of the pseudoscalar-baryon channels, changing the width and eventually the mass of the resonances generated with only the basis of vector-baryon states.