TL;DR
This paper updates the HERAPDF1.0 parton distribution functions to HERAPDF1.5 by including new HERA-II data and additional datasets, extending the analysis to NNLO and testing against collider data.
Contribution
It introduces the HERAPDF1.5 set with new data and NNLO analysis, improving PDF accuracy and understanding of charm and strong coupling constants.
Findings
Good description of Tevatron data
Consistent with early LHC results
Enhanced understanding of charm quark treatment
Abstract
The HERAPDF1.0 PDF set, which was an NLO QCD analysis based on H1 and ZEUS combined inclusive cross section data from HERA-I, has been updated to HERAPDF1.5 by including preliminary inclusive cross section data from HERA-II running. Studies have also been made by adding various other HERA data sets: combined charm data, combined low energy run data and H1 and ZEUS jet data. These data give information on the treatment of charm and the charm quark mass and on the value of . The PDF analysis has also been extended to NNLO. The PDFs give a good description of Tevatron and early LHC data.
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Taxonomy
TopicsSuperconducting Materials and Applications · Particle physics theoretical and experimental studies · Advanced Data Storage Technologies