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New parton distribution functions from a global analysis of quantum chromodynamics

Sayipjamal Dulat1,2,*, Tie-Jiun Hou3,†, Jun Gao4,‡, Marco Guzzi5,§, Joey Huston2,∥, Pavel Nadolsky3,¶, Jon Pumplin2,**, Carl Schmidt2,††, Daniel Stump2,‡‡ et al.

C.-P. Yuan2,§§

  • 1School of Physics Science and Technology, Xinjiang University, Urumqi, Xinjiang 830046, China
  • 2Department of Physics and Astronomy, Michigan State University, East Lansing, Michigan 48824, USA
  • 3Department of Physics, Southern Methodist University, Dallas, Texas 75275-0181, USA
  • 4High Energy Physics Division, Argonne National Laboratory, Argonne, Illinois 60439, USA
  • 5School of Physics and Astronomy, University of Manchester, Manchester M13 9PL, United Kingdom

  • *sdulat@msu.edu
  • †tiejiunh@mail.smu.edu
  • ‡jgao@anl.gov
  • §marco.guzzi@manchester.ac.uk
  • ∥huston@pa.msu.edu
  • nadolsky@physics.smu.edu
  • **pumplin@pa.msu.edu
  • ††schmidt@pa.msu.edu
  • ‡‡stump@pa.msu.edu
  • §§yuan@pa.msu.edu
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Phys. Rev. D 93, 033006 – Published 16 February, 2016

DOI: https://doi.org/10.1103/PhysRevD.93.033006

Abstract

We present new parton distribution functions (PDFs) at next-to-next-to-leading order (NNLO) from the CTEQ-TEA global analysis of quantum chromodynamics. These differ from previous CT PDFs in several respects, including the use of data from LHC experiments and the new D0 charged-lepton rapidity asymmetry data, as well as the use of a more flexible parametrization of PDFs that, in particular, allows a better fit to different combinations of quark flavors. Predictions for important LHC processes, especially Higgs boson production at 13 TeV, are presented. These CT14 PDFs include a central set and error sets in the Hessian representation. For completeness, we also present the CT14 PDFs determined at the LO and the NLO in QCD. Besides these general-purpose PDF sets, we provide a series of (N)NLO sets with various αs values and additional sets in general-mass variable flavor number schemes, to deal with heavy partons, with up to three, four, and six active flavors.

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Phys. Rev. D 93, 033006– Published 16 February, 2016
  • Received 6 August 2015
Article part of CHORUS

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