H1Zeus - HERA Combined Results

Proton structure diagram

PROTON STRUCTURE

Contacts: Amanda Cooper-Sarkar and Katarzyna Wichmann (ZEUS), Sasha Glazov, Ringaile Placakyte, Voica Radescu (H1)



H1 and ZEUS have combined inclusive Neutral and Charged Current measurements based on HERA I and HERA II data. The QCD fits of the proton parton distributions are performed (HERAPDF fits series). For certain sets also selected H1 and ZEUS jet data and/or H1ZEUS combined measurements of charm production in DIS (F2cc) are used.

QCD analysis of combined HERA data: for overview see HERAPDF version table

  • HERAPDF2.0jets NNLO (Preliminary) write-up H1prelim-19-041, ZEUS-prel-19-001
  • HERAPDF2.0 data combination, NLO and NNLO fit Paper Eur.Phys.J.C75 (2015) 12, 580 [arxiv:1506.06042]
      Figures here
      Auxillary material (data tables, LHA grids) here
  • HERAPDF1.5 LO (Preliminary) write-up H1prelim-13-141, ZEUS-prel-13-003
  • HERAPDF1.7 NLO (Preliminary) H1prelim-11-143, ZEUS-prel-11-010
  • HERAPDF1.5 NNLO (Preliminary) H1prelim-11-042, ZEUS-prel-11-002
  • HERAPDF1.6 (Preliminary) Jet cross sections used in PDF Fit H1prelim-11-034, ZEUS-prel-11-001
  • Charm Mass Parameter in the QCD Analysis and Implications for the LHC (Preliminary) H1prelim-10-143, ZEUS-prel-10-019
  • HERAPDF1.5: (Preliminary) H1prelim-10-142, ZEUS-prel-10-018
  • QCD Fit HERAPDF1.0 is released in the LHAPDF, PDF Set 6050-, 60530-

  • PDF fits including HERA data with reduced proton beam energy(Preliminary ) H1-prelim-10-044, ZEUS-prel-10-008
  • PDF fits including HERA charm data(Preliminary ) H1-prelim-10-045, ZEUS-prel-10-009.
  • PDF fits including HERA data with reduced proton beam energy and HERA combined charm data (Preliminary)
  • NNLO Fit for different choices of strong coupling constant. Grids in LHAPDF format available, as described here
  • Unconstrained Fit (relaxed assumptions on light sea symmetry at low x). Grid


    H1 + ZEUS data combination results:

  • Combined Measurement and QCD Analysis of the Inclusive ep Scattering Cross Sections at HERA JHEP 1001:109 (2010)

  • Combination of neutral and charged current cross sections at high Q2 at HERA (Preliminary) H1-prelim-10-141, ZEUS-prel-10-017
  • Combined Measurement of the longitudinal structure function at HERA (Preliminary) H1-prelim-10-043, ZEUS-prel-10-001


  • Electroweak Neutral Currents at HERA (Preliminary) H1prelim-06-142, ZEUS-prel-06-022

    Comparisons of non-combined H1 and ZEUS data:

    (1) NC and CC inclusive cross section as function of Q2 fig1
    NC and CC inclusive cross section as function of Q2
    (2) CC total cross section as function of the electron beam polarisation fig2
    CC total cross section as function of the electron beam polarisation






    lock_img Proton Structure Working Group Page