Light hadron spectrum using an O(a)-improved Wilson action with two dynamical quark flavours

TL;DR

This paper reports on calculations of the light hadron spectrum using an improved Wilson action with two dynamical quark flavors, comparing results at different lattice spacings and including quenched and lighter quark mass ensembles.

Contribution

It presents non-perturbatively O(a)-improved Wilson fermion results for the light hadron spectrum with two dynamical flavors, including comparisons across lattice spacings and quenched data.

Findings

Consistent hadron spectrum results at two lattice spacings

Comparison between dynamical and quenched ensembles

Initial results at lighter quark masses

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 16^3x32 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, r0. 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.