Physics – Nuclear Physics – Nuclear Theory
Scientific paper
2009-06-25
Chinese Physics C33, 1312 (2009)
Physics
Nuclear Physics
Nuclear Theory
Talk given at Workshop on the Physics of Excited Nucleon -- NSTAR2009, Beijing April 19 - 22, 2009
Scientific paper
We report our recent work on a hadronic molecule state of the KbarKN system with I=1/2 and J^P=1/2^+. We assume that the Lambda(1405) resonance and the scalar mesons, f_{0}(980), a_{0}(980), are reproduced as quasi-bound states of KbarN and KbarK, respectively. Performing non-relativistic three-body calculations with a variational method for this system, we find a quasibound state of the KbarKN system around 1910 MeV below the three-body breakup threshold. This state corresponds to a new baryon resonance of N* with J^P=1/2^+. We find also that this resonance has the cluster structure of the two-body bound states keeping their properties as in the isolated two-particle systems. We also briefly discuss another hadronic molecular state composed by two Kbar and one N, which corresponds to a Xi^* resonance.
Jido Daisuke
Kanada-En'yo Yoshiko
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