Combination of H1 and ZEUS Inclusive Deep Inelastic e{sup {+-}}p Scattering Cross Section Measurements and Extraction of the Proton Parton Density Functions using a NLO-QCD Fit

Journal Article · Mon Mar 23 04:00:00 EDT 2009 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3122153· OSTI ID:21293417

Radescu, Voica A ^[1]

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1. DESY, Notkestrasse 85, 22607 Hamburg (Germany)

A new averaging method is used to combine previously published HERA-I data by the H1 and ZEUS Collaborations of neutral and charged current inclusive cross sections for e{sup {+-}}p scattering. The combination procedure takes into account the systematic error correlations in a coherent approach, leading to a significantly reduced overall cross section uncertainty. This precise combined HERA-I data set is then 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 combined data results in PDFs with greatly reduced experimental uncertainties compared to the separate analyses of the H1 and ZEUS experiments. Model uncertainties, including those arising from parametrisation dependence, are also carefully considered. The resulting HERAPDFs have impressive precision compared to the global fits.

• OSTI ID: 21293417
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1105; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ACCURACY
ANTILEPTON-PROTON INTERACTIONS
CHARGED CURRENTS
CORRELATIONS
CROSS SECTIONS
DEEP INELASTIC SCATTERING
DISTRIBUTION FUNCTIONS
ELECTRON-PROTON INTERACTIONS
ERRORS
GLUONS
HERA STORAGE RING
MULTIPARTICLE SPECTROMETERS
PARTICLE IDENTIFICATION
PARTICLE STRUCTURE
PROTONS
QUANTUM CHROMODYNAMICS
QUARKS