Exploring the epsilon regime with lattice Wilson fermions

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dc.creatorBar, Oliver
dc.creatorNecco, Silvia
dc.creatorSchaefer, Stefan
dc.date2009-04-28
dc.date.accessioned2026-07-07T13:09:26Z
dc.date.available2026-07-07T13:09:26Z
dc.descriptionWe study the impact of explicit chiral symmetry breaking of lattice Wilson fermions on mesonic correlators in the epsilon-regime using Wilson chiral perturbation theory. We generalize the epsilon-expansion of continuum chiral perturbation theory to nonzero lattice spacing a and distinguish various regimes. It turnes out that lattice corrections are highly suppressed, as long as quark masses are of the order aΛ^2_QCD. The lattice spacing effects become more pronounced for smaller quark masses and may lead to non-trivial corrections of the continuum results at next-to-leading order. We compute these corrections for standard current and density correlation functions. A fit to lattice data shows that these corrections are small, as expected.
dc.description8 pages, 1 figure. Presented at the International Workshop on Effective Field Theories: from the pion to the upsilon, February 2-6 2009, Valencia, Spain
dc.identifierhttps://arxiv.org/abs/0904.4407
dc.identifierhttp://arxiv.org/abs/0904.4407
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/228734
dc.subjectHigh Energy Physics - Lattice
dc.titleExploring the epsilon regime with lattice Wilson fermions
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