Update: Accurate Determinations of alpha_s from Realistic Lattice QCD

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dc.creatorDavies, C. T. H.
dc.creatorHornbostel, K.
dc.creatorKendall, I. D.
dc.creatorLepage, G. P.
dc.creatorMcNeile, C.
dc.creatorShigemitsu, J.
dc.creatorTrottier, H.
dc.date2008-07-10
dc.date2008-12-14
dc.date.accessioned2026-07-07T12:26:56Z
dc.date.available2026-07-07T12:26:56Z
dc.descriptionWe use lattice QCD simulations, with MILC configurations (including vacuum polarization from u, d, and s quarks), to update our previous determinations of the QCD coupling constant. Our new analysis uses results from 6 different lattice spacings and 12 different combinations of sea-quark masses to significantly reduce our previous errors. We also correct for finite-lattice-spacing errors in the scale setting, and for nonperturbative chiral corrections to the 22 short-distance quantities from which we extract the coupling. Our final result is alpha_V(7.5GeV,nf=3) = 0.2120(28), which is equivalent to alpha_msbar(M_Z,n_f=5)= 0.1183(8). We compare this with our previous result, which differs by one standard deviation.
dc.description12 pages, 2 figures, 4 tables
dc.identifierhttps://arxiv.org/abs/0807.1687
dc.identifierhttp://arxiv.org/abs/0807.1687
dc.identifierPhys.Rev.D78:114507,2008
dc.identifierdoi:10.1103/PhysRevD.78.114507
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/215045
dc.subjectHigh Energy Physics - Lattice
dc.titleUpdate: Accurate Determinations of alpha_s from Realistic Lattice QCD
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