Baryon Resonances

TL;DR

This paper discusses recent theoretical results on baryon resonances modeled as meson-baryon systems, connecting predictions with experimental observations such as photoproduction processes and potential new baryon states.

Contribution

It presents novel theoretical insights into baryon resonances as meson-baryon systems, including predictions of new states and explanations of experimental data.

Findings

Prediction of a new $1/2^+$ baryon around 1920 MeV.

Discussion of the $ ext{Lambda}(1405)$ photoproduction.

Connection of theoretical models with experimental results.

Abstract

In this talk I show recent results on how many excited baryon resonances appear as systems of one meson and one baryon, or two mesons and one baryon, with the mesons being either pseudoscalar or vectors. Connection with experiment is made including a discussion on old predictions and recent results for the photoproduction of the $\Lambda(1405)$ resonance, as well as the prediction of one $1/2^+$ baryon state around 1920 MeV which might have been seen in the $\gamma p \to K^+ \Lambda$ reaction.