Parton distributions with QED corrections

Richard D. Ball, Valerio Bertone, Stefano Carrazza, Luigi Del Debbio, Stefano Forte*, Alberto Guffanti, Nathan P. Hartland, Juan Rojo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present a set of parton distribution functions (PDFs), based on the NNPDF2.3 set, which includes a photon PDF, and QED contributions to parton evolution. We describe the implementation of the combined QCD + QED evolution in the NNPDF framework. We then provide a first determination of the full set of PDFs based on deep-inelastic scattering data and LHC data for W and Z/gamma* Drell-Yan production, using leading-order QED and NLO or NNLO QCD. We compare the ensuing NNPDF2.3QED PDF set to the older MRST2004QED set. We perform a preliminary investigation of the phenomenological implications of NNPDF2.3QED: specifically, photon-induced corrections to direct photon production at HERA, and high-mass dilepton and W pair production at the LHC. (C) 2013 Elsevier B.V. All rights reserved.
Original languageEnglish
Pages (from-to)290-320
Number of pages30
JournalNuclear physics b
Volume877
Issue number2
DOIs
Publication statusPublished - 11 Dec 2013

Keywords

  • ONE-LOOP CORRECTIONS
  • W LEPTON ASYMMETRY
  • DRELL-YAN PROCESS
  • RADIATIVE-CORRECTIONS
  • PP COLLISIONS
  • ROOT-S=7 TEV
  • ELECTROWEAK CORRECTIONS
  • CROSS-SECTIONS
  • HIGH-ENERGY
  • LHC

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