Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2008-10-31
Hyperfine Interactions 193 (2009) 237-243
Physics
Nuclear Physics
Nuclear Theory
6 pages, 2 figures, Talk given at International Conference on Exotic Atoms (EXA08), September 15-18, 2008, Stefan-Meyer-Instit
Scientific paper
10.1007/s10751-009-0006-9
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.
Hyodo Tetsuo
Weise Wolfram
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