Meson exchange and nucleon polarizabilities in the quark model - art. no. 065202

Modifications to the nucleon electric polarizability induced by pion and si gma exchange in the q-q potentials are studied by means of sum rule techniq ues within a nonrelativistic quark model. Contributions from meson exchange interactions are found to be small and in general reduce the quark core po larizability for a number of hybrid and one-boson-exchange q-q models. Thes e results can be explained by the constraints that the baryonic spectrum im pose on the short-range behavior of the mesonic interactions.