The determination of alpha s from lattice QCD with 2+1 flavors of dynamical quarks

Davies, C. et al. (2003) The determination of alpha s from lattice QCD with 2+1 flavors of dynamical quarks. Nuclear Physics, Section B, Proceedings Supplements, 119, 595 -597. (doi: 10.1016/S0920-5632(03)01631-1)

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Publisher's URL: http://dx.doi.org/10.1016/S0920-5632(03)01631-1

Abstract

We describe the first lattice determination of the strong coupling constant with 3 flavors of dynamical quarks. The method follows previous analyses in using a perturbative expansion for the plaquette and Upsilon spectroscopy to set the scale. Using dynamical configurations from the MILC collaboration with 2+1 flavors of dynamical quarks we are able to avoid previous problems of having to extrapolate to 3 light flavors from 0 and 2. Our result agrees with our previous work: alpha /sub theta //sup MS/(Mz) = 0.121(3).

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Follana, Dr Eduardo and Shigemitsu, Prof Junko and Davies, Professor Christine
Authors: Davies, C., Gray, A., Alford, M., Follana, E., Hein, J., Lepage, P., Mason, Q., Nobes, M., Shigemitsu, J., Trottier, H., and Wingate, M.
Subjects:Q Science > QC Physics
College/School:College of Science and Engineering > School of Physics and Astronomy
Journal Name:Nuclear Physics, Section B, Proceedings Supplements
Publisher:Elsevier BV
ISSN:0920-5632
ISSN (Online):1873-3832

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