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Report number arXiv:1911.13164 ; DESY-19-211
Title Improved constraints on parton distributions using LHCb, ALICE and HERA heavy-flavour measurements and implications for the predictions for prompt atmospheric-neutrino fluxes
Author(s) Zenaiev, O. (Hamburg U., Inst. Theor. Phys. II) ; Garzelli, M.V. (Florence U. ; INFN, Florence ; Tubingen U.) ; Lipka, K. (DESY) ; Moch, S.-O. (Hamburg U., Inst. Theor. Phys. II) ; Cooper-Sarkar, A. (Oxford U.) ; Olness, F. (Southern Methodist U.) ; Geiser, A. (DESY) ; Sigl, G. (Hamburg U., Inst. Theor. Phys. II)
Collaboration PROSA Collaboration
Imprint 2019-11-29. - 24 p.
Subject category hep-ph ; Particle Physics - Phenomenology
Accelerator/Facility, Experiment CERN LHC ; LHCb
CERN LHC ; ALICE
DESY HERA ; ZEUS
Abstract The impact of measurements of heavy-flavour production in deep inelastic $ep$ scattering and in $pp$ collisions on parton distribution functions is studied in a QCD analysis at next-to-leading order. Recent combined results of inclusive and heavy-flavour production cross sections in deep inelastic scattering at HERA are investigated together with heavy-flavour production measurements at the LHC. Differential cross sections of charm- and beauty-hadron production measured by the LHCb collaboration at the centre-of-mass energies of 5, 7 and 13 TeV as well as the recent measurements of the ALICE experiment at the centre-of-mass energies of 5 and 7 TeV are explored. These data impose additional constraints on the gluon and the sea-quark distributions at low partonic fractions $x$ of the proton momentum, down to $x\approx10^{-6}$. The impact of the resulting parton distribution function in the predictions for the prompt atmospheric-neutrino fluxes is studied.
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 Record created 2019-12-17, last modified 2020-01-21


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