Recent Results for the Baryon Antidecuplet within the Chiral Quark-Soliton Model(Exotic Hadrons,New Frontiers in QCD 2010-Exotic Hadron Systems and Dense Matter-)

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We review recent results of properties of the baryon antidecuplet within the SU(3) chiral quark-soliton model, in particular, employing an model-independent approach. Considering isospin symmetry breakings from electromagnetic self-energies as well as hadronic contributions, we determine all model parameters based on the experimental data for the masses of the baryon octet together with the masses of the Θ^+ and N^*(1685). The predicted masses of the baryon decuplet are in good agreement with the data. We also show the results for the transition magnetic moments of radiative decay N^*→γN. The results imply that the neutron channel is at least ten times more enhanced than the proton channel. The axialvector constant for Θ^+→KN is predicted and turns out to be tiny, which leads to the small decay width for the Θ^+ decay: Γ_<Θ→KN>=0.80±0.12MeV.
2010-12-17