Baryon resonances as dynamically generated states in chiral dynamics

TL;DR

This paper explores baryon resonances as dynamically generated states within chiral coupled channels, highlighting the origins of certain resonances, their transition amplitudes, and the potential for hadronic molecular states in nuclear systems.

Contribution

It provides a microscopic chiral dynamics framework for understanding baryon resonances and their properties, emphasizing the need for additional components in describing N(1535).

Findings

Resonances can be described as dynamically generated in chiral models.

N(1535) requires components beyond meson-baryon states.

Transition amplitudes and form factors can be calculated without extra parameters.

Abstract

We discuss baryon resonances which are dynamically generated in hadron dynamics based on chiral coupled channels approach. With the dynamical description of the baryon resonance, we discuss the origin of the resonance pole, finding that for the description of N(1535) some other components than meson and baryon are necessary. Since the chiral unitary model provides a microscopic description in terms of constituent hadrons, it is straightforward to calculate transition amplitudes and form factors of resonances without introducing further parameters. Finally we briefly discuss few-body nuclear kaonic systems as hadronic molecular states.