Gluon propagator, triple gluon vertex and the QCD coupling constant

D. Becirevic , Ph. Boucaud , J.P. Leroy , J. Micheli , O. Pene , J. Rodriguez-Quintero , C. Roiesnel

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classification ✦ hep-lat

keywords gluonpropagatortriplevertexaboveartifactsasymptoticcompare

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We study the UV-scaling of the flavorless gluon propagator in the Landau gauge in an energy window up to 9 GeV. Dominant hypercubic lattice artifacts are eliminated. A large set of renormalization schemes is used to test asymptotic scaling. We compare with our results obtained directly from the triple gluon vertex. We end-up with \Lambda_{\bar{\rm{MS}}} = 318(12)(5) MeV and 292(5)(15) MeV respectively for these two methods, compatible which each other but significantly above the Schrodinger method estimate.

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Gluon propagator, triple gluon vertex and the QCD coupling constant

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