A new N* resonance as a hadronic molecular state
Jido, Daisuke · Kanada-En'yo, Yoshiko
Original · EN
We report our recent work on a hadronic molecule state of the KbarKN system with I=1/2 and Jᵖ=1/2+. We assume that the Lambda(1405) resonance and the scalar mesons, f₀(980), a₀(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 Jᵖ=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.
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