Hadronic molecules and scattering amplitudes from the nonrelativistic quark model

This report summarizes recent calculations of low-energy hadron-hadron scattering amplitudes in the nonrelativistic quark potential model, which assume that the scattering mechanism is a single interaction (usually one gluon exchange) followed by constituent interchange. We refer to the scattering diagrams as ''quark Born diagrams''. For the cases chosen to isolate this mechanism, I = 2 ππ, I = 3/2 Kπ, KN and NN, the results are usually in good agreement with experimental S-wave scattering amplitudes given standard potential-model parameters. These calculations also lead to predictions of vector-vector bound states, one of which may be the θ(1710). This assignment can be tested by searches for KK-barππ and φπ0γ decay modes of the θ(1710). (author)