Baryon resonances as hadronic molecule states with kaons

Abstract

We investigate hadronic molecule states of \(K \bar K N\) and \(\bar K \bar K N\) systems with I = 1/2 and J P = 1/2 + , assuming that Λ(1405) and the scalar mesons, f 0(980), a 0(980), are reproduced as quasi-bound states of \(\bar KN\) and \(K \bar K\). Performing non-relativistic three-body calculations for these systems, we find weakly bound states for \(K \bar K N\) and \(\bar K \bar K N\) around 1900 MeV, which correspond to new baryon resonances of N * and Ξ * with J P = 1/2 + . We find that these resonances have cluster structure of the two-body bound state keeping its properties as in the isolated two-particle system.