My research is in elementary particle theory. Much of it uses the computational methods of lattice gauge theory and is done in collaboration with researchers at nine other institutions. This collaboration, known as MILC, tackles a wide range of problems in strong and weak interactions and high-temperature physics. A major focus of my recent work has been analytic work on low energy effective theories of QCD, namely chiral perturbation theory . My calculations seek to bridge the gap between numerical lattice calculations and the real world of continuum particle physics. Building on work of Lee and Sharpe, graduate student Christopher Aubin and I developed "staggered chiral perturbation theory" (SChPT) which adjusts the results of continuum chiral perturbation theory to take into account discretization errors introduced by staggered fermions on the lattice.