Lambda(1405) in chiral SU(3) dynamics

Abstract

We discuss several aspects of the Lambda(1405) resonance in relation to the recent theoretical developments in chiral dynamics. We derive an effective single-channel KbarK N interaction based on chiral SU(3) coupled-channel approach, emphasizing the important role of the pi Sigma channel and the structure of the Lambda(1405) in Kbar N phenomenology. In order to clarify the structure of the resonance, we study the behavior with the number of colors (Nc) of the poles associated with the Lambda(1405), and argue the physical meaning of the renormalization procedure.

4 pages, no figure, Talk given at Chiral Symmetry in Hadron and Nuclear Physics (Chiral07), November 13-16, 2007, Osaka Univ., Japan. v2: Typos corrected

References in corpus (5)

• Chiral dynamics in the presence of bound states: kaon-nucleon interactions revisited
• On the nature of light scalar mesons from their large $N_c$ behavior
• Effective Kbar N interaction based on chiral SU(3) dynamics
• $K^{-}pp$ system with chiral SU(3) effective interaction
• Structure of the Lambda(1405) baryon resonance from its large Nc behavior

Cited by in corpus (1)

• The $\Lambda (1405)$ as a Hybrid