Gauge-invariant smearing and matrix correlators using Wilson fermions at beta =6.2.

We present an investigation of gauge-invariant smearing for Wilson fermions in quenched lattice QCD on a 24[sup 3][times]48 lattice at [beta]=6.2. We demonstrate a smearing algorithm that allows a substantial improvement in the determination of the baryon spectrum obtained using propagators smeared at both source and sink, at only a small computational cost. We investigate the matrix of correlators constructed from local and smeared operators, and are able to expose excited states of both the mesons and baryons.