Hadronic Few-Body Systems in Chiral Dynamics

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説明

Hadronic composite states are introduced as few-body systems in hadron physics. The Λ(1405) resonance is a good example of the hadronic few-body systems. It has turned out that Λ(1405) can be described by hadronic dynamics in a modern technology which incorporates coupled channel unitarity framework and chiral dynamics. The idea of the hadronic Kbar N composite state of Λ(1405) is extended to kaonic few-body states. It is concluded that, due to the fact that K and N have similar interaction nature in s-wave Kbar couplings, there are few-body quasibound states with kaons systematically just below the break-up thresholds, like KbarNN, KbarKN and KbarKK, as well as Λ(1405) as a KbarN quasibound state and f0(980) and a0(980) as KbarK.

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