A critical appraisal and evaluation of modern PDFs

Accardi, A. (Hampton University, 23668, Hampton, VA, USA) (Jefferson Lab, 23606, Newport News, VA, USA) ; Alekhin, S. (II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany) (Institute for High Energy Physics, 142281, Protvino, Moscow region, Russia) ; Blümlein, J. (Deutsches Elektronensynchrotron DESY, Platanenallee 6, 15738, Zeuthen, Germany) ; Garzelli, M. V. (II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany) ; Lipka, K. (Deutsches Elektronensynchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany) ; Melnitchouk, W. (Jefferson Lab, 23606, Newport News, VA, USA) ; Moch, S. (II. Institut für Theoretische Physik, Universität Hamburg, Luruper Chaussee 149, 22761, Hamburg, Germany) ; Owens, J. F. (Florida State University, 32306, Tallahassee, FL, USA) ; Plačakytė, R. (Deutsches Elektronensynchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany) ; Reya, E. (Institut für Physik, Technische Universität Dortmund, 44221, Dortmund, Germany) ; Sato, N. (Jefferson Lab, 23606, Newport News, VA, USA) ; Vogt, A. (Department of Mathematical Sciences, University of Liverpool, L69 3BX, Liverpool, UK) ; Zenaiev, O. (Deutsches Elektronensynchrotron DESY, Notkestraße 85, 22607, Hamburg, Germany)

23 August 2016

Abstract: We review the present status of the determination of parton distribution functions (PDFs) in the light of the precision requirements for the LHC in Run 2 and other future hadron colliders. We provide brief reviews of all currently available PDF sets and use them to compute cross sections for a number of benchmark processes, including Higgs boson production in gluon–gluon fusion at the LHC. We show that the differences in the predictions obtained with the various PDFs are due to particular theory assumptions made in the fits of those PDFs. We discuss PDF uncertainties in the kinematic region covered by the LHC and on averaging procedures for PDFs, such as advocated by the PDF4LHC15 sets, and provide recommendations for the usage of PDF sets for theory predictions at the LHC.


Published in: EPJC 76 (2016) 471
Published by: Springer/Società Italiana di Fisica
DOI: 10.1140/epjc/s10052-016-4285-4
License: CC-BY-3.0



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