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@INPROCEEDINGS{Schneekloth:288191,
author = {Schneekloth, Uwe},
title = {{C}ombination of {M}easurements of {I}nclusive {D}eep
{I}nelastic ep {S}cattering {C}ross {S}ections and {QCD}
{A}nalysis of {HERA} {D}ata},
school = {DESY},
reportid = {PUBDB-2015-04838},
year = {2015},
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 ep
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, Q2,
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
$alpha_s$ $(M_Z^2)$ = 0.1183 +- 0.0009(exp) +-
0.0005(model/parameterisation) +- 0.0012(hadronisation)
+0.0037 -0.0030 (scale). An extraction of $xF_3(gamma$ Z)
and results on electroweak unification and scaling
violations are also presented.},
month = {Jun},
date = {2015-06-15},
organization = {PHOTON 2015, Novosibirsk (Russia), 15
Jun 2015 - 19 Jun 2015},
cin = {ZEUS/F1},
cid = {$I:(DE-H253)ZEUS_F1-20120731$},
pnm = {611 - Fundamental Particles and Forces (POF3-611)},
pid = {G:(DE-HGF)POF3-611},
experiment = {EXP:(DE-588)4276505-5},
typ = {PUB:(DE-HGF)6},
url = {https://bib-pubdb1.desy.de/record/288191},
}