A lattice evaluation of four-quark operators in the nucleon

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dc.creatorGöckeler, M.
dc.creatorHorsley, R.
dc.creatorKlaus, B.
dc.creatorPleiter, D.
dc.creatorRakow, P. E. L.
dc.creatorSchaefer, S.
dc.creatorSchäfer, A.
dc.creatorSchierholz, G.
dc.date2001-03-30
dc.date.accessioned2026-07-07T11:47:01Z
dc.date.available2026-07-07T11:47:01Z
dc.descriptionNucleon matrix elements of various four-quark operators are evaluated in quenched lattice QCD using Wilson fermions. Some of these operators give rise to twist-four contributions to nucleon structure functions. Furthermore, they bear valuable information about the diquark structure of the nucleon. Mixing with lower-dimensional operators is avoided by considering appropriate representations of the flavour group. We find that for a certain flavour combination of baryon structure functions, twist-four contributions are very small. This suggests that twist-four effects for the nucleon might be much smaller than m_p^2/Q^2.
dc.description17 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/hep-lat/0103038
dc.identifierhttp://arxiv.org/abs/hep-lat/0103038
dc.identifierNucl.Phys.B623:287-300,2002
dc.identifierdoi:10.1016/S0550-3213(01)00631-9
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/202426
dc.subjectHigh Energy Physics - Lattice
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA lattice evaluation of four-quark operators in the nucleon
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