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dc.creatorDinter, S
dc.creatorAlexandrou, C
dc.creatorConstantinou, M
dc.creatorDrach, V
dc.creatorJansen, K
dc.creatorRenner, DB
dc.date.accessioned2021-02-04T21:37:57Z
dc.date.available2021-02-04T21:37:57Z
dc.date.issued2011-10-05
dc.identifier.issn0370-2693
dc.identifier.issn1873-2445
dc.identifier.doihttp://dx.doi.org/10.34944/dspace/6008
dc.identifier.other831SD (isidoc)
dc.identifier.urihttp://hdl.handle.net/20.500.12613/6026
dc.description.abstractWe present a dedicated analysis of the influence of excited states on the calculation of nucleon matrix elements. This calculation is performed at a fixed value of the lattice spacing, volume and pion mass that are typical of contemporary lattice computations. We focus on the nucleon axial charge, gA, for which we use about 7500 measurements, and on the average momentum of the unpolarized isovector parton distribution, 〈x〉u-d, for which we use about 23,000 measurements. All computations are done employing Nf=2+1+1 maximally-twisted-mass Wilson fermions and using non-perturbatively calculated renormalization factors. Excited state effects are shown to be negligible for gA, whereas they lead to an O(10%) downward shift for 〈x〉u-d. © 2011 Elsevier B.V.
dc.format.extent89-93
dc.language.isoen
dc.relation.haspartPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
dc.relation.isreferencedbyElsevier BV
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectNucleon matrix element
dc.subjectParton distribution function
dc.subjectLattice QCD
dc.titlePrecision study of excited state effects in nucleon matrix elements
dc.typeArticle
dc.type.genreJournal Article
dc.relation.doi10.1016/j.physletb.2011.09.002
dc.ada.noteFor Americans with Disabilities Act (ADA) accommodation, including help with reading this content, please contact scholarshare@temple.edu
dc.date.updated2021-02-04T21:37:55Z
refterms.dateFOA2021-02-04T21:37:58Z


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