Axial coupling constant of the nucleon for two flavours of dynamical quarks in finite and infinite volume

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dc.creatorKhan, A. Ali
dc.creatorGöckeler, M.
dc.creatorHägler, Ph.
dc.creatorHemmert, T. R.
dc.creatorHorsley, R.
dc.creatorPleiter, D.
dc.creatorRakow, P. E. L.
dc.creatorSchäfer, A.
dc.creatorSchierholz, G.
dc.creatorWollenweber, T.
dc.creatorZanotti, J. M.
dc.date2006-03-30
dc.date2006-11-28
dc.date.accessioned2026-07-07T11:43:23Z
dc.date.available2026-07-07T11:43:23Z
dc.descriptionWe present data for the axial coupling constant g_A of the nucleon obtained in lattice QCD with two degenerate flavours of dynamical non-perturbatively improved Wilson quarks. The renormalisation is also performed non-perturbatively. For the analysis we give a chiral extrapolation formula for g_A based on the small scale expansion scheme of chiral effective field theory for two degenerate quark flavours. Applying this formalism in a finite volume we derive a formula that allows us to extrapolate our data simultaneously to the infinite volume and to the chiral limit. Using the additional lattice data in finite volume we are able to determine the axial coupling of the nucleon in the chiral limit without imposing the known value at the physical point.
dc.description21 pages, 7 figures; v2: some clarifications added, to appear in Phys. Rev. D
dc.identifierhttps://arxiv.org/abs/hep-lat/0603028
dc.identifierhttp://arxiv.org/abs/hep-lat/0603028
dc.identifierPhys.Rev.D74:094508,2006
dc.identifierdoi:10.1103/PhysRevD.74.094508
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201220
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleAxial coupling constant of the nucleon for two flavours of dynamical quarks in finite and infinite volume
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