arXiv:hep-lat/0304004·v1·High Energy Physics — Lattice
High-Precision Lattice QCD Confronts Experiment
C. T. H. Davies🇬🇧 · E. Follana🇬🇧 · A. Gray🇬🇧 · G. P. Lepage🇺🇸 · Q. Mason🇺🇸 · M. Nobes🇨🇦 · J. Shigemitsu🇺🇸 · H. D. Trottier🇨🇦 · M. Wingate🇺🇸 · C. Aubin🇺🇸 · C. Bernard🇺🇸 · T. Burch🇺🇸
Abstract
We argue that high-precision lattice QCD is now possible, for the first time, because of a new improved staggered quark discretization. We compare a wide variety of nonperturbative calculations in QCD with experiment, and find agreement to within statistical and systematic errors of 3% or less. We also present a new determination of alpha_msbar(Mz); we obtain 0.121(3). We discuss the implications of this breakthrough for phenomenology and, in particular, for heavy-quark physics.
Comments: 2 figures, revtex