Abstract
I present results of recent work for the UKQCD collaboration on the light hadron spectrum using a non-perturbatively O(a)-improved Wilson action with two degenerate flavours of dynamical quarks on a 16 3 × 32 lattice. Values of the bare gauge coupling and bare dynamical quark mass were chosen to keep the lattice spacing fixed at two distinct values in physical units as determined through the Sommer scale parameter, r 0. I also include results for a quenched ensemble with a lattice spacing matching one of these dynamical sets and results from an exploratory run at lighter bare quark mass.
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