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Extraction of the proton parton density functions using a NLO-QCD fit of the combined H1 and ZEUS inclusive DIS cross sections

Abstract : The combined HERA-I data set, of neutral and charged current inclu- sive cross-sections for e+p and e−p scattering, is used as the sole input for a next-to-leading order (NLO) QCD parton distribution function (PDF) fit. The consistent treatment of systematic uncertainties in the joint data set ensures that experimental uncertainties on the PDFs can be calculated without need for an increased χ2 tolerance. This results in PDFs with greatly reduced experimental uncertainties compared to the separate analyses of the ZEUS and H1 experiments. Model uncer- tainties, including those arising from parametrization dependence, are also carefully considered. The resulting HERAPDFs have impressive precision compared to the global fits.
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Submitted on : Monday, October 12, 2009 - 5:35:12 PM
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G. Li. Extraction of the proton parton density functions using a NLO-QCD fit of the combined H1 and ZEUS inclusive DIS cross sections. XXXVIII International Symposium on Multiparticle Dynamics (ISMD 2008), Sep 2008, Hamburg, Germany. pp.31-35, ⟨10.3204/DESY-PROC-2009-01/38⟩. ⟨in2p3-00423780⟩

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