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• W2952570355 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." @default.
• W2952570355 created "2019-06-27" @default.
• W2952570355 creator A5063211755 @default.
• W2952570355 date "2015-06-19" @default.
• W2952570355 modified "2023-09-27" @default.
• W2952570355 title "Combination of Measurements of Inclusive Deep Inelastic $e^{pm}p$ Scattering Cross Sections and QCD Analysis of HERA Data" @default.
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• W2952570355 hasPublicationYear "2015" @default.
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