Resonances in chiral unitary approaches
arXiv:0711.4042 · doi:10.1007/978-3-540-85144-8_15
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.
6 pages, contribution to the Workshop on the Physics of excited nucleons (NSTAR 2007), Bonn (Germany) 5-8 September 2007