Meson-baryon nature of Lambda(1405) in chiral dynamics
classification
⚛️ nucl-th
hep-ph
keywords
chiraldynamicslambdaoriginresonanceaffordsambiguityapproach
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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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