Restless pions: orbifold boundary conditions and noise suppression in lattice QCD

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dc.creatorBedaque, Paulo F.
dc.creatorWalker-Loud, Andre
dc.date2007-08-01
dc.date.accessioned2026-07-07T11:18:20Z
dc.date.available2026-07-07T11:18:20Z
dc.descriptionThe study of one or more baryons in lattice QCD is severely hindered by the exponential decay in time of the signal-to-noise ratio. The rate at which the signal-to-noise decreases is a function of the the pion mass. More precisely, it depends on the minimum allowed pion energy in the box, which, for periodic boundary conditions, is equal to its mass. We propose a set of boundary conditions, given by a "parity orbifold'' construction, which eliminates the zero momentum pion modes, raising the minimum pion energy without altering the QCD ground state, and thereby improving the signal-to-noise ratio of (multi)-baryon correlation functions at long Euclidean times. We discuss variations of these "restless pions" boundary conditions and focus on their impact on the study of nuclear forces.
dc.description15 pages, 4 figures
dc.identifierhttps://arxiv.org/abs/0708.0207
dc.identifierhttp://arxiv.org/abs/0708.0207
dc.identifierPhys.Lett.B660:369-375,2008
dc.identifierdoi:10.1016/j.physletb.2008.01.011
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193311
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectHigh Energy Physics - Theory
dc.subjectNuclear Theory
dc.titleRestless pions: orbifold boundary conditions and noise suppression in lattice QCD
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