Gauge-variant propagators and the running coupling from lattice QCD

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dc.creatorIlgenfritz, E. -M.
dc.creatorMüller-Preussker, M.
dc.creatorSternbeck, A.
dc.creatorSchiller, A.
dc.date2006-01-21
dc.date.accessioned2026-07-07T06:58:09Z
dc.date.available2026-07-07T06:58:09Z
dc.descriptionOn the occasion of the 70th birthday of Prof. Adriano Di Giacomo we report on recent numerical computations of the Landau gauge gluon and ghost propagators as well as of a non-symmetric MOM-scheme ghost-gluon vertex in quenched and full lattice QCD. Special emphasis is paid to the Gribov copy problem and to the unquenching effect. The corresponding running coupling α_s(q^2) is found and shown to decrease for q^2 \le 0.3 GeV^2 in the infrared limit. No indication for a non-trivial infrared fixed point is seen in agreement with findings from truncated systems of Dyson-Schwinger equations treated on a four-dimensional torus.
dc.descriptioncontribution to "Sense of Beauty in Physics", Festschrift in honor of Adriano Di Giacomo's 70-th birthday
dc.identifierhttps://arxiv.org/abs/hep-lat/0601027
dc.identifierhttp://arxiv.org/abs/hep-lat/0601027
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/107243
dc.subjectHigh Energy Physics - Lattice
dc.titleGauge-variant propagators and the running coupling from lattice QCD
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