Hadronic Molecules and Scattering Amplitudes from the Nonrelativistic Quark Model

Abstract

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 OGE) 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 K$π$, 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 K$\bar{\rm K}ππ$ and $ϕπ^0γ$ decay modes of the $θ(1710)$.