Physics Results with Three Flavors of Asqtad Quarks on MILC Ensembles

Steven A. Gottlieb

Indiana University

For some time, the MILC Collaboration has been generating ensembles of gauge configurations containing the effects of three flavors of dynamical quarks. Generally, these ensembles have degenerate up and down quarks with a mass as small as one-tenth the strange quark mass. A range of lattice spacing from 0.06 to 0.18 fm is available. The ensembles use the improved staggered quark action known as Asqtad. These configurations have been shared with the international lattice field theory community and used for a variety of physics studies. This talk will concentrate on work by the MILC, Fermilab and HPCQCD collaborations on spectrum, light and heavy-light pseudoscalar decay constants, quark masses, semileptonic decay constants, and QCD equation of state. Future prospects will be mentioned.