PROTON STRUCTURE

QCD Fit HERAPDF1.5 NNLO:    H1prelim-11-???, ZEUS-prel-11-002
Part of the HERA II data has been combined (H1-prelim-10-141,ZEUS-prel-10-017). The PDF set HERAPDF1.5 represents the QCD analysis of the combined HERA I including the preliminary combination of the HERA II data. Such, higher precision at high Q² and high x is achieved. The precision of the PDFs at high x is significantly improved, particularly in the valence sector.

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On this page the results of the NNLO fit variant can be found: the PDFs and their uncertainties. The fit was performed with 14 free PDF parameters. There are also comparisons to the previous HERAPDF1.0 NNLO PDF, based on HERA I data only, and to the new HERAPDF1.5f, which is a NLO version with also 14 free parameters in the fit.

(1) HERAPDF1.5 NNLO Q2=2 GeV2
HERAPDF1.5 NNLO Q2=2 GeV2
(2) HERAPDF1.5 NNLO Q2=10 GeV2
HERAPDF1.5 NNLO Q2=10 GeV2
(3) HERAPDF1.5 NNLO Q2=10000 GeV2
HERAPDF1.5 NNLO Q2=10000 GeV2
(4) HERAPDF1.5 NNLO Q2=2 GeV2 linx scale
HERAPDF1.5 NNLO Q2=2 GeV2 linx scale
(5) HERAPDF1.5 NNLO Q2=10 GeV2 linx scale
HERAPDF1.5 NNLO Q2=10 GeV2 linx scale
(6) HERAPDF1.5 NNLO Q2=10000 GeV2 linx scale
HERAPDF1.5 NNLO Q2=10000 GeV2 linx scale
(7) HERAPDF1.5 NNLO PDFs, with their fractional uncertainties, Q2=10GeV2
HERAPDF1.5 NNLO PDFs, with their fractional uncertainties, Q2=10GeV2
(8) HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO Q2=2 GeV2
HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO Q2=2 GeV2
(9) HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO Q2=10 GeV2
HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO Q2=10 GeV2
(10) HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO Q2=10000 GeV2
HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO Q2=10000 GeV2
(11) HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO, Q2=2 GeV2, linx scale
HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO, Q2=2 GeV2, linx scale
(12) HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO, Q2=10 GeV2, linx scale
HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO, Q2=10 GeV2, linx scale
(13) HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO, Q2=10000 GeV2, linx scale
HERAPDF1.5 NNLO vs HERAPDF1.0 NNLO, Q2=10000 GeV2, linx scale
(14) HERAPDF1.5 NNLO vs HERAPDF1.5f (NLO), Q2=2 GeV2
HERAPDF1.5 NNLO vs HERAPDF1.5f (NLO), Q2=2 GeV2
(15) HERAPDF1.5 NNLO vs HERAPDF1.5f (NLO), Q2=10 GeV2
HERAPDF1.5 NNLO vs HERAPDF1.5f (NLO), Q2=10 GeV2
(16) HERAPDF1.5 NNLO vs HERAPDF1.5f (NLO), Q2=10000 GeV2
HERAPDF1.5 NNLO vs HERAPDF1.5f (NLO), Q2=10000 GeV2