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Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x

Abstract : The impact of recent measurements of heavy-flavour production in deep inelastic $ep$ scattering and in $pp$ collisions on parton distribution functions is studied in a QCD analysis in the fixed-flavour number scheme at next-to-leading order. Differential cross sections of charm- and beauty-hadron production measured by LHCb are used together with inclusive and heavy-flavour production cross sections in deep inelastic scattering at HERA. The heavy-flavour data of the LHCb experiment impose additional constraints on the gluon and the sea-quark distributions at low partonic fractions $x$ of the proton momentum, down to $x \sim 5 \times 10^{-6}$. This kinematic range is currently not covered by other experimental data in perturbative QCD fits.
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http://hal.in2p3.fr/in2p3-01132372
Contributor : Emmanuelle Vernay <>
Submitted on : Tuesday, March 17, 2015 - 10:01:42 AM
Last modification on : Monday, July 20, 2020 - 9:18:30 AM

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O. Zenaiev, A. Geiser, K. Lipka, J. Blümlein, A. Cooper-Sarkar, et al.. Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2015, 75, pp.396. ⟨10.1140/epjc/s10052-015-3618-z⟩. ⟨in2p3-01132372⟩

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