A Global Fit to Scattering Data with NLL BFKL Resummations

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dc.creatorWhite, C. D.
dc.creatorThorne, R. S.
dc.date2006-11-15
dc.date.accessioned2026-07-07T11:02:12Z
dc.date.available2026-07-07T11:02:12Z
dc.descriptionWe calculate DIS-scheme splitting and coefficient functions for electromagnetic deep inelastic scattering with small x resummations, as given by the NLL BFKL equation with running coupling and approximate NLL resummed impact factors. The resummations are combined with a NLO fixed order expansion, and the improved quantities thus obtained are stable at small x and significantly suppressed with respect to LL results. These results are implemented in a global fit to DIS and related data, and the results compared to a NLO fixed order DIS-scheme fit and with a previous LL resummed fit. The NLL resummed fit quality is excellent, and constitutes a marked improvement over the purely fixed order approach. The input gluon, at Q_0^2=1GeV^2, obtained from the resummed fit is positive and slightly increasing as x-->0, in contrast to the result obtained at fixed order. A resummed prediction for the longitudinal structure function F_L is presented. It is positive definite and growing with energy at low x and Q^2, where the fixed order results show a significant perturbative instability.
dc.description52 pages, 27 figures
dc.identifierhttps://arxiv.org/abs/hep-ph/0611204
dc.identifierhttp://arxiv.org/abs/hep-ph/0611204
dc.identifierPhys.Rev.D75:034005,2007
dc.identifierdoi:10.1103/PhysRevD.75.034005
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/188181
dc.subjectHigh Energy Physics - Phenomenology
dc.titleA Global Fit to Scattering Data with NLL BFKL Resummations
dc.typetext

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