Meson-baryon nature of Lambda(1405) in chiral dynamics
arXiv:0911.2740 · doi:10.1016/j.nuclphysa.2010.01.229
Abstract
We present the recent progress in the study on the origin of baryon resonances in chiral dynamics. It is shown that in the chiral coupled-channel approach, the form of the interaction cannot be specified due to the cutoff of the loop integral. To avoid this ambiguity, we propose a natural renormalization scheme, which affords a clue to the origin of the resonance, together with the phenomenological fitting to experimental data. We study the structure of the Lambda(1405) resonance in comparison with the N(1535).
4 pages, 1 figure, Talk given at HYP-X, September 14-18, 2009, Tokai, Japan
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