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Further precise determinations of α s from lattice QCD

Further precise determinations of α s from lattice QCD We present a new determination of the strong coupling constant from lattice QCD simulations. We use four different short-distance quantities to obtain the coupling, three different (infrared) meson splittings to tune the simulation parameters, and a wide range of lattice spacings, quark masses, and lattice volumes to test for systematic errors. Our final result consists of ten different determinations of α P ( 3 ) ( 8.2 GeV ) , which agree well with each other and with our previous results. The most accurate of these, when evolved perturbatively to the Z 0 mass, gives α MS ¯ ( 5 ) ( M Z ) = 0.1174 ( 24 ) . We compare our results with those obtained from other recent lattice simulations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Physical Review D American Physical Society (APS)

Further precise determinations of α s from lattice QCD

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References (43)

Publisher
American Physical Society (APS)
Copyright
Copyright © 1997 The American Physical Society
ISSN
1089-4918
DOI
10.1103/PhysRevD.56.2755
Publisher site
See Article on Publisher Site

Abstract

We present a new determination of the strong coupling constant from lattice QCD simulations. We use four different short-distance quantities to obtain the coupling, three different (infrared) meson splittings to tune the simulation parameters, and a wide range of lattice spacings, quark masses, and lattice volumes to test for systematic errors. Our final result consists of ten different determinations of α P ( 3 ) ( 8.2 GeV ) , which agree well with each other and with our previous results. The most accurate of these, when evolved perturbatively to the Z 0 mass, gives α MS ¯ ( 5 ) ( M Z ) = 0.1174 ( 24 ) . We compare our results with those obtained from other recent lattice simulations.

Journal

Physical Review DAmerican Physical Society (APS)

Published: Sep 1, 1997

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