Towards small-$x$ resummed parton distribution functions

Abstract

We present preliminary results for fits of parton distribution functions (PDFs) which include the resummation of small-$x$ logarithms at NLLx accuracy, performed in the NNPDF framework. We observe an improvement in the description of DIS data at small values of Bjorken $x$ when resummation effects are included. The improvement is more marked when comparing NNLO+NLLx fits to NNLO ones, and is particularly noticeable for small-$x$ and small-$Q^2$ HERA inclusive structure functions. The main effect of the resummation is an enhancement of the gluon and singlet PDFs at small-$x$, which persists at high scales.

6 pages, 2 figures. To appear in the proceedings of the XXV International Workshop on Deep-Inelastic Scattering and Related Subjects, 3-7 April 2017, University of Birmingham, UK

References in corpus (14)

• Parton distributions from high-precision collider data
• New parton distribution functions from a global analysis of quantum chromodynamics
• Parton Distribution Functions, ${\alpha }_s$ and Heavy-Quark Masses for LHC Run II
• Constraints on large-$x$ parton distributions from new weak boson production and deep-inelastic scattering data
• Heavy quarks in deep-inelastic scattering
• Delineating parton distributions and the strong coupling
• Small x Resummation with Quarks: Deep-Inelastic Scattering
• On the Higgs cross section at N${}^3$LO+N${}^3$LL and its uncertainty
• Intrinsic charm in a matched general-mass scheme
• Deviations from NLO QCD evolution in inclusive HERA data
• Resummation of Hadroproduction Cross-sections at High Energy
• HERA data and DGLAP evolution: theory and phenomenology
• Small x resummation of rapidity distributions: the case of Higgs production
• Towards small x resummed DIS phenomenology

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