Lattice Landau gauge via Stereographic Projection

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dc.creatorvon Smekal, Lorenz
dc.creatorJorkowski, Alexander
dc.creatorMehta, Dhagash
dc.creatorSternbeck, Andre
dc.date2008-12-16
dc.date.accessioned2026-07-07T12:16:11Z
dc.date.available2026-07-07T12:16:11Z
dc.descriptionThe complete cancellation of Gribov copies and the Neuberger 0/0 problem of lattice BRST can be avoided in modified lattice Landau gauge. In compact U(1), where the problem is a lattice artifact, there remain to be Gribov copies but their number is exponentially reduced. Moreover, there is no cancellation of copies there as the sign of the Faddeev-Popov determinant is positive. Applied to the maximal Abelian subgroup this avoids the perfect cancellation amongst the remaining Gribov copies for SU(N) also. In addition, based on a definition of gauge fields on the lattice as stereographically-projected link variables, it provides a framework for gauge fixed Monte-Carlo simulations. This will include all Gribov copies in the spirit of BRST. Their average is not zero, as demonstrated explicitly in simple models. This might resolve present discrepancies between gauge-fixed lattice and continuum studies of QCD Green's functions.
dc.description5 pages, talk presented at the 8th Conference Quark Confinement and the Hadron Spectrum, September 1-6, 2008, Mainz, Germany
dc.identifierhttps://arxiv.org/abs/0812.2992
dc.identifierhttp://arxiv.org/abs/0812.2992
dc.identifierPoS Confinement8:048,2008
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/211719
dc.subjectHigh Energy Physics - Theory
dc.titleLattice Landau gauge via Stereographic Projection
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