Parton distribution benchmarking with LHC data

Richard D. Ball*, Stefano Carrazza, Luigi Del Debbio, Stefano Forte, Jun Gao, Nathan Hartland, Joey Huston, Pavel Nadolsky, Juan Rojo, Daniel Stump, Robert S. Thorne, C. -P. Yuan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We present a detailed comparison of the most recent sets of NNLO PDFs from the ABM, CT, HERAPDF, MSTW and NNPDF collaborations. We compare parton distributions at low and high scales and part on luminosities relevant for LHC phenomenology. We study the PDF dependence of LHC benchmark inclusive cross sections and differential distributions for electroweak boson and jet production in the cases in which the experimental covariance matrix is available. We quantify the agreement between data and theory by computing the chi(2) for each data set with all the various PDFs. PDF comparisons are performed consistently for common values of the strong coupling. We also present a benchmark comparison of jet production at the LHC, comparing the results from various available codes and scale settings. Finally, we discuss the implications of the updated NNLO PDF sets for the combined PDF+alpha(s) uncertainty in the gluon fusion Higgs production cross sections.

Original languageEnglish
Article number125
Number of pages46
JournalJournal of High Energy Physics
Volume2013
Issue number04
DOIs
Publication statusPublished - Apr 2013

Keywords

  • hep-ph
  • hep-ex
  • nucl-ex
  • nucl-th

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