HERA Combined Cross Sections and Parton Densities

Details HERA Combined Cross Sections and Parton Densities HERA Combined Cross Sections and Parton Densities

2008-09-29

arxiv.org/abs/0809.4946v2

Physics

High Energy Physics

High Energy Physics - Experiment

Cosmetic changes (header, pagenumber) as requested by editors of the ICHEP proceedings

Scientific paper

Deep inelastic scattering cross section measurements previously published by the H1 and ZEUS collaborations are combined. The procedure takes into account the systematic error correlations in a coherent way, leading to a significantly reduced overall cross section uncertainty. The combined H1 and ZEUS measurements of the inclusive neutral and charged current cross sections are used to perform a common NLO QCD fit. The consistent treatment of systematic uncertainties in the joint data set ensures that the resulting set of parton density functions (PDFs) have a much reduced experimental uncertainty compared to the previous PDF extractions performed separately by the H1 and ZEUS collaborations.

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