Lambda(1405) in chiral SU(3) dynamics

2); (2) YITP; (3) Murcia Univ. (4) RCNP; Atsushi Hosaka (4) ((1) TU Muenchen; Daisuke Jido (2); Kyoto Univ.; Luis Roca (3); Osaka Univ.); Tetsuo Hyodo (1; Wolfram Weise (1)

arxiv: 0802.2212 · v2 · submitted 2008-02-15 · ✦ hep-ph · nucl-th

Lambda(1405) in chiral SU(3) dynamics

Tetsuo Hyodo (1 , 2) , Wolfram Weise (1) , Daisuke Jido (2) , Luis Roca (3) , Atsushi Hosaka (4) ((1) TU Muenchen , (2) YITP , Kyoto Univ.

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(3) Murcia Univ. (4) RCNP Osaka Univ.)

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classification ✦ hep-ph nucl-th

keywords lambdachiraldynamicsresonancestructureapproachargueaspects

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We discuss several aspects of the Lambda(1405) resonance in relation to the recent theoretical developments in chiral dynamics. We derive an effective single-channel KbarK N interaction based on chiral SU(3) coupled-channel approach, emphasizing the important role of the pi Sigma channel and the structure of the Lambda(1405) in Kbar N phenomenology. In order to clarify the structure of the resonance, we study the behavior with the number of colors (Nc) of the poles associated with the Lambda(1405), and argue the physical meaning of the renormalization procedure.

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Lambda(1405) in chiral SU(3) dynamics

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