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.Comment: 2 figures, revte

Aubin, C.

Bernard, C.

Burch, T.

Davies, C. T. H.

DeTar, C.

Di Pierro, M.

El-Khadra, A.

Follana, E.

Gottlieb, Steven

Gray, A.

Gregory, E. B.

Heller, U. M.

Hetrick, J. E.

Kronfeld, A. S.

Lepage, G. P.

Mackenzie, P. B.

Mason, Q.

Menscher, D.

Nobes, M.

Osborn, J.

Shigemitsu, J.

Simone, J.

Sugar, R.

Toussaint, D.

Trottier, H. D.

Wingate, M.

English

arXiv

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

T. H. Davies, C.

P. Lepage, G.

D. Trottier, H.

B. Gregory, E.

M. Heller, U.

E. Hetrick, J.

S. Kronfeld, A.

B. Mackenzie, P.

Edinburgh Research Explorer

High-Precision Lattice QCD Confronts Experiment

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

High-Precision Lattice QCD Confronts Experiment

Abstract

Similar works

Full text

Available Versions

Edinburgh Research Explorer

Enlighten: Publications

Enlighten