Chiral dynamics of the two Lambda(1405) states

Details Chiral dynamics of the two Lambda(1405) states Chiral dynamics of the two Lambda(1405) states

2004-06-15

arxiv.org/abs/nucl-th/0406047v1

Physics

Nuclear Physics

Nuclear Theory

4 pages, LaTeX, 2 eps figures, uses ws-procs9x6.cls, rotating_pr.sty and wrapft.sty. Talk given at Workshop on the Physics of

Scientific paper

The Lambda(1405) resonance is studied by a chiral unitary approach, in which the resonance is dynamically generated in coupled-channel meson-baryon scattering. Investigating the analytic structure of the scattering amplitudes obtained by the chiral unitary approach, we find two poles around the energies of the Lambda(1405) coupling differently to the meson-baryon states. We reach the conclusion that the Lambda(1405) resonance seen in experiments is not just one single resonance, but a superposition of these two states.

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