Hadronic Few-Body Systems in Chiral Dynamics |
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Authors: | Daisuke Jido |
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Institution: | 1. Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto, 606-8502, Japan
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Abstract: | 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 ${\bar KN}$ 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 ${\bar K}$ couplings, there are few-body quasibound states with kaons systematically just below the break-up thresholds, like ${\bar KNN, \,\bar KKN}$ and ${\bar KKK}$ , as well as Λ(1405) as a ${\bar KN}$ quasibound state and f 0(980) and a 0(980) as ${\bar KK}$ . |
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