EXOTIC HYBRID MESONS AND 4-QUARK STATES

We calculate masses of mesons with exotic quantum numbers in the quenc hed approximation. Using a four quark source operator, we demonstrate mixing of the 1(-+) meson with four-quark states. Using the convention al Wilson quark action, we calculate both at reasonably light quark ma sses, intending to extrapolate to small quark mass, and near the charm ed quark mass, where we calculate the masses of some (c) over bar cg h ybrid mesons. The hybrid masses are large - over 4 GeV for charmonium and more than twice the vector meson mass at the strange quark mass.