Resonances in chiral unitary approaches

TL;DR

This paper reviews how chiral unitary approaches, incorporating unitarity in coupled channels, offer new insights into the nature of baryonic resonances, including the Lambda(1405) and charmed baryons.

Contribution

It summarizes early achievements and recent evidence supporting the two-pole structure of Lambda(1405) and presents results on charmed baryon resonances.

Findings

Evidence for the two-pole nature of Lambda(1405)

Results on charmed baryon resonances

Advances in chiral unitary theoretical descriptions

Abstract

The extension of chiral theories to the description of resonances, via the incorporation of unitarity in coupled channels, has provided us with a new theoretical perspective on the nature of some of the observed excited hadrons. In this contribution some of the early achievements in the field of baryonic resonances are reviewed, the recent evidence of the two-pole nature of the Lambda(1405) is discussed and results on charmed baryon resonances are presented.