Meson-baryon nature of Lambda(1405) in chiral dynamics

Details Meson-baryon nature of Lambda(1405) in chiral dynamics Meson-baryon nature of Lambda(1405) in chiral dynamics

2009-11-14

arxiv.org/abs/0911.2740v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, 1 figure, Talk given at HYP-X, September 14-18, 2009, Tokai, Japan

Scientific paper

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).

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