Vector meson-Baryon dynamics and generation of resonances

TL;DR

This study investigates vector meson-octet baryon interactions using a comprehensive approach, leading to the dynamical generation of several baryon resonances consistent with known states.

Contribution

It introduces a detailed coupled channel analysis including multiple interaction diagrams to identify resonance generation in vector meson-baryon systems.

Findings

Generated resonances match known baryon states.

Identified importance of all interaction channels except s-channel.

Predicted specific resonance properties consistent with experimental data.

Abstract

The purpose of this work is to study vector meson-octet baryon interactions with the aim to find dynamical generation of resonances in such systems. For this, we consider s-, t-, u-channel diagrams along with a contact interaction originating from the hidden local symmetry Lagrangian. We find the contribution from all these sources, except the s-channel, to be important. The amplitudes obtained by solving coupled channel Bethe Salpeter equations for systems with total strangeness zero, show generation of one isospin 3/2, spin 1/2 resonance and three isospin 1/2 resonances: two with spin 3/2 and one with spin 1/2. We identify these resonances with $\Delta (1900) S_{31}$, $N^* (2080) D_{13}$, $N^* (1700) D_{13}$, and $N^*(2090) S_{11}$, respectively.