Masses of the Light Hadrons in the Chiral and Cloudy Bag Models

The masses of the light hadrons except for the pion are calculated in the stable chiral and cloudy bag models with the massless or massive u, d quark and pion. Two difficulties in these models, i.e., the lack of stability and the divergence of the quark self-energy, are removed by taking into account a phenomenological non-local quark-pion interaction. The effects of the finite size of the qq pion and the behavior of the quark self-energy are discussed in detail. In our calculation the bag self-energy due to the pion has an important role in the origin of the N-Δ and Σ-Λ mass differences. The baryon octet and decuplet masses are well reproduced by the present model.

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