Chiral dynamics, structure of Lambda(1405), and Kbar N phenomenology

Abstract

We investigate the structure of the Lambda(1405) resonance and Kbar N phenomenology in the perspective of chiral SU(3) dynamics. Utilizing the chiral coupled-channel approach which well describes the Kbar N scattering observable, we perform three different analyses to clarify the structure of the Lambda(1405) resonance. The results consistently indicate the meson-baryon molecule picture of the Lambda(1405). We argue the consequence of the chiral dynamics in Kbar N phenomenology and the antikaon bound state in nucleus, emphasizing the important role of the strong pi Sigma interaction.