Abstract
In this talk we report on how, using a chiral unitary approach for the meson–baryon interactions, two octets of J π = 1 / 2 − baryon states and a singlet are generated dynamically, resulting in the case of strangeness S = − 1 in two poles of the scattering matrix close to the nominal Λ ( 1405 ) resonance. We suggest experiments which could show evidence for the existence of these states.
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