Home > Publications database > Combination of Measurements of Inclusive Deep Inelastic $e^{\pm}p$ Scattering Cross Sections and QCD Analysis of HERA Data
 
Report/Journal Article PUBDB-2015-04314
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Combination of Measurements of Inclusive Deep Inelastic $e^{\pm}p$ Scattering Cross Sections and QCD Analysis of HERA Data

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2015
Springer Berlin

The European physical journal / C 75(12), 580 () [10.1140/epjc/s10052-015-3710-4]
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Report No.: DESY-15-039; arXiv:1506.06042

Abstract: A combination is presented of all inclusive deep inelastic cross sections previously published by the H1 and ZEUS collaborations at HERA for neutral and charged current $e^{\pm}p$ scattering for zero beam polarisation. The data were taken at proton beam energies of 920, 820, 575 and 460 GeV and an electron beam energy of 27.5 GeV. The data correspond to an integrated luminosity of about 1 fb$^{-1}$ and span six orders of magnitude in negative four-momentum-transfer squared, $Q^2$, and Bjorken $x$. The correlations of the systematic uncertainties were evaluated and taken into account for the combination. The combined cross sections were input to QCD analyses at leading order, next-to-leading order and at next-to-next-to-leading order, providing a new set of parton distribution functions, called HERAPDF2.0. In addition to the experimental uncertainties, model and parameterisation uncertainties were assessed for these parton distribution functions. Variants of HERAPDF2.0 with an alternative gluon parameterisation, HERAPDF2.0AG, and using fixed-flavour-number schemes, HERAPDF2.0FF, are presented. The analysis was extended by including HERA data on charm and jet production, resulting in the variant HERAPDF2.0Jets. The inclusion of jet-production cross sections made a simultaneous determination of these parton distributions and the strong coupling constant possible, resulting in $\alpha_s(M_Z)=0.1183 \pm 0.0009 {\rm(exp)} \pm 0.0005{\rm (model/parameterisation)} \pm 0.0012{\rm (hadronisation)} ^{+0.0037}_{-0.0030}{\rm (scale)}$. An extraction of $xF_3^{\gamma Z}$ and results on electroweak unification and scaling violations are also presented.

Keyword(s): parton: distribution function ; beam: energy ; p: beam ; beam: polarization ; electron: beam ; scaling: violation ; jet: production ; parametrization ; DESY HERA Stor ; quantum chromodynamics ; scattering ; deep inelastic scattering ; electroweak interaction ; coupling constant ; strong coupling ; charged current ; hadronization ; correlation ; Bjorken ; gluon ; charm ; ZEUS

Classification:

Note: OA
Contributing Institute(s):
  1. ZEUS Kollaboration (ZEUS)
  2. H1 Kollaboration (H1)
Research Program(s):
  1. 611 - Fundamental Particles and Forces (POF3-611) (POF3-611)
Experiment(s):
  1. HERA: H1
  2. HERA: ZEUS

Appears in the scientific report 2015
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Medline ; Creative Commons Attribution CC BY 4.0 ; SCOAP3 OpenAccess ; OpenAccess ; Current Contents - Physical, Chemical and Earth Sciences ; IF >= 5 ; JCR ; NationallizenzNationallizenz ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection
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Private Collections > >DESY > >FH > >H1 > H1
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Combination of Measurements of Inclusive Deep Inelastic $e^{\pm}p$ Scattering Cross Sections and QCD Analysis of HERA Data
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 Record created 2015-10-23, last modified 2025-07-17
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