Combination and QCD analysis of charm and beauty production cross-section measurements in deep inelastic ep scattering at HERA

Research output: Contribution to journalArticlepeer-review


  • HERA collaboration

Colleges, School and Institutes

External organisations

  • Tel Aviv University
  • Max-Planck-Institut für Physik
  • Electronics and Telecommunications
  • National Centre for Nuclear Research
  • Panjab University
  • Russian Academy of Science (LPI RAS)
  • Department of Physics and Astronomy and INFN
  • National Taras Shevchenko University of Kyiv
  • Yerevan Physics Institute
  • Institute of Physics and Technology of the Mongolian Academy of Sciences
  • DESY
  • INFN Padova
  • Ruprecht-Karls-Universität Heidelberg
  • Laboratoire Leprince-Ringuet
  • Georg August Universitaet
  • IN2P3
  • University of Bonn
  • University College London
  • University of Padova
  • University of Birmingham
  • University of Glasgow
  • Moscow Institute of Physics and Technology
  • Alikhanov Institute for Theoretical and Experimental Physics
  • CINVESTAV Unidad Merida
  • University of Calabria
  • York University
  • Charles University
  • Polish Academy of Sciences
  • University of Warsaw,
  • University of Oxford
  • Academy of Sciences of Czech Republic
  • University of Liverpool
  • Universität Wuppertal
  • Moscow State University
  • Horia Hulubei National Institute of Physics and Nuclear Engineering


Measurements of open charm and beauty production cross sections in deep inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections are obtained in the kinematic range of negative four-momentum transfer squared of the photon 2.5GeV2≤Q2≤2000GeV2 and Bjorken scaling variable 3 · 10 - 5≤ xBj≤ 5 · 10 - 2. The combination method accounts for the correlations of the statistical and systematic uncertainties among the different datasets. Perturbative QCD calculations are compared to the combined data. A next-to-leading order QCD analysis is performed using these data together with the combined inclusive deep inelastic scattering cross sections from HERA. The running charm- and beauty-quark masses are determined as mc(mc)=1.290-0.041+0.046(exp/fit)-0.014+0.062(model)-0.031+0.003(parameterisation) GeV and mb(mb)=4.049-0.109+0.104(exp/fit)-0.032+0.090(model)-0.031+0.001(parameterisation)GeV.


Original languageEnglish
Article number473
JournalEuropean Physical Journal C
Issue number6
Publication statusE-pub ahead of print - 9 Jun 2018