Higher-twist contributions to F_L and F_2 from instantons

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dc.creatorDressler, B.
dc.creatorMaul, M.
dc.creatorWeiss, C.
dc.date2000-06-21
dc.date.accessioned2026-07-07T03:41:49Z
dc.date.available2026-07-07T03:41:49Z
dc.descriptionWe study the twist-4 contribution to the unpolarized nucleon structure functions, F_L and F_2, in an approach where the vacuum structure of QCD is described by a dilute medium of instantons ($\barρ/ \bar R \ll 1$). The dominant power corrections come from the twist-4 quark-gluon operators and are of the order $1/(\barρ^2 Q^2)$. The contributions from four-quark operators are suppressed. The approach predicts large 1/Q^2-corrections to F_L, in agreement with the results of QCD fits to the data.
dc.description4 pages, LaTeX, uses sprocl.sty. Contribution to Proceedings of DIS 2000, Liverpool, April 25 - 30, 2000
dc.identifierhttps://arxiv.org/abs/hep-ph/0006252
dc.identifierhttp://arxiv.org/abs/hep-ph/0006252
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/39710
dc.subjectHigh Energy Physics - Phenomenology
dc.titleHigher-twist contributions to F_L and F_2 from instantons
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