Effective Kbar N interaction with strong pi Sigma dynamics constrained by chiral SU(3) symmetry

Abstract

We derive a single-channel effective Kbar N interaction from chiral SU(3) coupled-channel dynamics, emphasizing the important role of the pi Sigma channel and the structure of the Lambda(1405) resonance. The chiral low energy theorem requires strongly attractive interaction not only in the Kbar N channel but also in the pi Sigma channel. As a consequence of the strong pi Sigma dynamics, the equivalent potential in single Kbar N channel turns out to be less attractive than the one used in a purely phenomenological approach.

6 pages, 2 figures, Talk given at International Conference on Exotic Atoms (EXA08), September 15-18, 2008, Stefan-Meyer-Institut, Wien

References in corpus (9)

• Effective Kbar N interaction based on chiral SU(3) dynamics
• Faddeev calculation of a $K^{-}pp$ quasi-bound state
• Strange dibaryon resonance in the anti-KNN--piYN system
• Evidence for the two pole structure of the Lambda(1405) resonance
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