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Combination and QCD analysis of charm and beauty production cross-section measurements in deep inelastic ep scattering at HERA

Measurements of open charm and beauty production cross sections in deep inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections are obtained in the kinematic range of negative four-momentum transfer squared of the photon 2.5 GeV2≤Q2≤2000GeV22.5 GeV2≤Q...

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Main Authors: Abramowicz, Halina (Author) , Bolz, Arthur (Author) , Britzger, Daniel (Author) , Lisovyi, Mykhailo (Author) , Masciocchi, Silvia (Author) , Sauter, Michel David (Author) , Schöning, André (Author)
Corporate Author: Deutsches Elektronen-Synchrotron, ZEUS Collaboration (Author)
Format: Article (Journal)
Language:English
Published: 9 June 2018
In: The European physical journal. C, Particles and fields
Year: 2018, Volume: 78, Issue: 6
ISSN:1434-6052
DOI:10.1140/epjc/s10052-018-5848-3
Online Access:Verlag, Volltext: https://doi.org/10.1140/epjc/s10052-018-5848-3
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Author Notes:H1 and ZEUS collaborations: H. Abramowicz, A. Bolz, D. Britzger, M. Lisovyi, S. Masciocchi, M. Sauter, A. Schöning [und weitere]
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Summary:Measurements of open charm and beauty production cross sections in deep inelastic ep scattering at HERA from the H1 and ZEUS Collaborations are combined. Reduced cross sections are obtained in the kinematic range of negative four-momentum transfer squared of the photon 2.5 GeV2≤Q2≤2000GeV22.5 GeV2≤Q2≤2000GeV22.5~\hbox {GeV}^2\le Q^2 \le 2000\, \hbox {GeV}^2 and Bjorken scaling variable 3⋅10−5≤xBj≤5⋅10−23⋅10−5≤xBj≤5⋅10−23 \cdot 10^{-5} \le x_\mathrm{Bj} \le 5 \cdot 10^{-2}. The combination method accounts for the correlations of the statistical and systematic uncertainties among the different datasets. Perturbative QCD calculations are compared to the combined data. A next-to-leading order QCD analysis is performed using these data together with the combined inclusive deep inelastic scattering cross sections from HERA. The running charm- and beauty-quark masses are determined as mc(mc)=1.290+0.046−0.041(exp/fit)mc(mc)=1.290−0.041+0.046(exp/fit)m_c(m_c) = 1.290^{+0.046}_{-0.041} \mathrm{(exp/fit)} +0.062−0.014(model)−0.014+0.062(model){}^{+0.062}_{-0.014} \mathrm{(model)} +0.003−0.031(parameterisation)−0.031+0.003(parameterisation){}^{+0.003}_{-0.031} \mathrm{(parameterisation)} GeV and mb(mb)=4.049+0.104−0.109(exp/fit)mb(mb)=4.049−0.109+0.104(exp/fit)m_b(m_b) = 4.049^{+0.104}_{-0.109} \mathrm{(exp/fit)} +0.090−0.032(model)−0.032+0.090(model){}^{+0.090}_{-0.032} \mathrm{(model)} +0.001−0.031(parameterisation) GeV−0.031+0.001(parameterisation) GeV{}^{+0.001}_{-0.031} \mathrm{(parameterisation)}~\mathrm{GeV}.
Item Description:Gesehen am 26.04.2019
Physical Description:Online Resource
ISSN:1434-6052
DOI:10.1140/epjc/s10052-018-5848-3

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