The Landau gauge lattice ghost propagator in stochastic perturbation theory

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dc.creatorDi Renzo, F.
dc.creatorIlgenfritz, E. -M.
dc.creatorPerlt, H.
dc.creatorSchiller, A.
dc.creatorTorrero, C.
dc.date2008-09-29
dc.date.accessioned2026-07-07T13:12:01Z
dc.date.available2026-07-07T13:12:01Z
dc.descriptionWe present one- and two-loop results for the ghost propagator in Landau gauge calculated in Numerical Stochastic Perturbation Theory (NSPT). The one-loop results are compared with available standard Lattice Perturbation Theory in the infinite-volume limit. We discuss in detail how to perform the different necessary limits in the NSPT approach and discuss a recipe to treat logarithmic terms by introducing ``finite-lattice logs''. We find agreement with the one-loop result from standard Lattice Perturbation Theory and estimate, from the non-logarithmic part of the ghost propagator in two-loop order, the unknown constant contribution to the ghost self-energy in the RI'-MOM scheme in Landau gauge. That constant vanishes within our numerical accuracy.
dc.description7 pages, 4 figures, to appear in the Proceedings of the XXVI International Symposium on Lattice Field Theory, July 14 -- 19, 2008, Williamsburg, VA, USA
dc.identifierhttps://arxiv.org/abs/0809.4950
dc.identifierhttp://arxiv.org/abs/0809.4950
dc.identifierPoS LATTICE2008:217,2008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/229464
dc.subjectHigh Energy Physics - Lattice
dc.titleThe Landau gauge lattice ghost propagator in stochastic perturbation theory
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