Dynamically generated resonances from the vector octet-baryon octet interaction

TL;DR

This paper investigates vector meson and octet baryon interactions using a coupled channels approach, predicting and explaining baryon resonances and their degeneracies, aiding experimental searches especially in the strange sector.

Contribution

It applies the local hidden gauge formalism to dynamically generate and analyze baryon resonances from vector meson-octet baryon interactions, revealing degenerate state patterns.

Findings

Identification of poles corresponding to known baryon resonances.

Prediction of new resonances in the strange sector.

Observation of degenerate J^P=1/2^-,3/2^- states.

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. We examine the scattering amplitudes and their poles, which can be associated to known J^P=1/2^-,3/2^- baryon resonances, in some cases, or give predictions in other ones. The formalism employed produces doublets of degenerate J^P=1/2^-,3/2^- states, a pattern which is observed experimentally in several cases. The findings of this work should also be useful to guide present experimental programs searching for new resonances, in particular in the strange sector where the current information is very poor.