Combination and QCD Analysis of Charm Production Cross Section Measurements in Deep-Inelastic ep Scattering at HERA - INSPIRE

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Combination and QCD Analysis of Charm Production Cross Section Measurements in Deep-Inelastic ep Scattering at HERA

H1 and
ZEUS

Collaborations

Oct, 2012

47 pages

Published in:

Eur.Phys.J.C 73 (2013) 2, 2311

Published: Feb 20, 2013

e-Print:

1211.1182 [hep-ex]

DOI:

10.1140/epjc/s10052-013-2311-3

PDG:

{\mathit {\mathit c}}

Report number:

DESY-12-172

Experiments:

View in:

reference search283 citations

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Abstract: (Springer)

Measurements of open charm production cross sections in deep-inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections for charm production are obtained in the kinematic range of photon virtuality 2.5≤Q (2)≤2000 GeV(2) and Bjorken scaling variable 3⋅10(−5)≤x≤5⋅10(−2). The combination method accounts for the correlations of the systematic uncertainties among the different data sets. The combined charm data together with the combined inclusive deep-inelastic scattering cross sections from HERA are used as input for a detailed NLO QCD analysis to study the influence of different heavy flavour schemes on the parton distribution functions. The optimal values of the charm mass as a parameter in these different schemes are obtained. The implications on the NLO predictions for W (±) and Z production cross sections at the LHC are investigated. Using the fixed flavour number scheme, the running mass of the charm quark is determined.

Note:

Long author list - awaiting processing •
46 pages, 14 figures

positron p: deep inelastic scattering
charm: production
parton: distribution function
electron p: deep inelastic scattering
mass: energy dependence
scaling: Bjorken
deep inelastic scattering: inclusive reaction
DESY HERA Stor
quantum chromodynamics: perturbation theory
channel cross section: measured

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