Low energy chiral constants from epsilon-regime simulations with improved Wilson fermions

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dc.creatorHasenfratz, Anna
dc.creatorHoffmann, Roland
dc.creatorSchaefer, Stefan
dc.date2008-06-27
dc.date2008-10-02
dc.date.accessioned2026-07-07T11:52:06Z
dc.date.available2026-07-07T11:52:06Z
dc.descriptionWe present a lattice QCD calculation of the low energy constants of the leading order chiral Lagrangian. In these simulations the epsilon regime is reached by using tree-level improved nHYP Wilson fermions combined with reweighting in the quark mass. We analyze two point functions on two ensembles with lattices of size (1.85fm)^4 and (2.8fm)^4, and at several quark mass values between 4 and 20 MeV. The data are well fitted with next-to-leading order chiral perturbative formulae and predict F=90(4)MeV and Sigma^(1/3)=248(6)MeV in the MS-bar scheme at 2 GeV.
dc.descriptionExtended discussion on reweighting, including a new figure, discussion on reaching the epsilon regime with chiral fermions, and some small stylistic changes. Version published in PRD. 17 pages, 9 figures
dc.identifierhttps://arxiv.org/abs/0806.4586
dc.identifierhttp://arxiv.org/abs/0806.4586
dc.identifierPhys.Rev.D78:054511,2008
dc.identifierdoi:10.1103/PhysRevD.78.054511
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/204114
dc.subjectHigh Energy Physics - Lattice
dc.titleLow energy chiral constants from epsilon-regime simulations with improved Wilson fermions
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