Interaction of vector mesons with baryons and nuclei

TL;DR

This paper reviews recent advances in understanding vector meson interactions with baryons and nuclei using the local hidden gauge formalism, highlighting dynamically generated resonances, charm sector states, and implications for $J/\psi$ suppression.

Contribution

It introduces a modern approach to vector meson interactions with baryons, including the charm sector and nuclear effects, extending the formalism to phenomena like $J/\psi$ suppression.

Findings

Resonances as composite states from vector meson-baryon interactions.

Prediction of hidden charm baryon states around 4400 MeV.

Suggestions for measuring the width of $K^*$ in nuclei and $J/\psi$ suppression effects.

Abstract

After some short introductory remarks on particular issues on the vector mesons in nuclei, in this paper we present a short review of recent developments concerning the interaction of vector mesons with baryons and with nuclei from a modern perspective using the local hidden gauge formalism for the interaction of vector mesons. We present results for the vector baryon interaction and in particular for the resonances which appear as composite states, dynamically generated from the interaction of vector mesons with baryons, taking also the mixing of these states with pseudoscalars and baryons into account. We then venture into the charm sector, reporting on hidden charm baryon states around 4400 MeV, generated from the interaction of vector mesons and baryons with charm, which have a strong repercussion on the properties of the $J/\Psi N$ interaction. We also address the interaction of $K^*$ with nuclei and make suggestions to measure the predicted huge width in the medium by means of the transparency ratio. The formalism is extended to study the phenomenon of $J/\psi$ suppression in nuclei via $J/\psi$ photoproduction reactions.