title: High-precision lattice QCD confronts experiment.
abstract: The recently developed Symanzik-improved staggered-quark discretization allows unquenched lattice-QCD simulations with much smaller (and more realistic) quark masses than previously possible. To test this formalism, we compare experiment with a variety of nonperturbative calculations in QCD drawn from a restricted set of "gold-plated" quantities. We find agreement to within statistical and systematic errors of 3% or less. We discuss the implications for phenomenology and, in particular, for heavy-quark physics.
authors.affiliation: Department of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom.
authors.forename: C T H
authors.initials: CT
authors.lastname: Davies
authors.forename: E
authors.initials: E
authors.lastname: Follana
authors.forename: A
authors.initials: A
authors.lastname: Gray
authors.forename: G P
authors.initials: GP
authors.lastname: Lepage
authors.forename: Q
authors.initials: Q
authors.lastname: Mason
authors.forename: M
authors.initials: M
authors.lastname: Nobes
authors.forename: J
authors.initials: J
authors.lastname: Shigemitsu
authors.forename: H D
authors.initials: HD
authors.lastname: Trottier
authors.forename: M
authors.initials: M
authors.lastname: Wingate
authors.forename: C
authors.initials: C
authors.lastname: Aubin
authors.forename: C
authors.initials: C
authors.lastname: Bernard
authors.forename: T
authors.initials: T
authors.lastname: Burch
authors.forename: C
authors.initials: C
authors.lastname: DeTar
authors.forename: Steven
authors.initials: S
authors.lastname: Gottlieb
authors.forename: E B
authors.initials: EB
authors.lastname: Gregory
authors.forename: U M
authors.initials: UM
authors.lastname: Heller
authors.forename: J E
authors.initials: JE
authors.lastname: Hetrick
authors.forename: J
authors.initials: J
authors.lastname: Osborn
authors.forename: R
authors.initials: R
authors.lastname: Sugar
authors.forename: D
authors.initials: D
authors.lastname: Toussaint
authors.forename: M
authors.initials: M
authors.lastname: Di Pierro
authors.forename: A
authors.initials: A
authors.lastname: El-Khadra
authors.forename: A S
authors.initials: AS
authors.lastname: Kronfeld
authors.forename: P B
authors.initials: PB
authors.lastname: Mackenzie
authors.forename: D
authors.initials: D
authors.lastname: Menscher
authors.forename: J
authors.initials: J
authors.lastname: Simone