Masses of the Light Hadrons and Self-Energies in the Bag Model

Abstract

The masses of the light hadrons are calculated in terms of the cloudy bag model with self-energies due to both gluon and pion exchange. By use of a type of pion-quark interaction which incorporates the finite extent of the pion the convergent self-energy due to pion exchange is obtained. The difficulties in the bag models which only include one type of the self-energies can be removed by taking account of both and the baryon spectrum is reproduced well. It is found that these self-energies are large but have opposite effect on the masses of the hadrons.