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

O. Zenaiev*, A. Geiser, K. Lipka, J. Blümlein, A. Cooper-Sarkar, M. V. Garzelli, M. Guzzi, O. Kuprash, S. O. Moch, P. Nadolsky, R. Placakyte, K. Rabbertz, I. Schienbein, P. Starovoitov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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 ∼ 5×10-6. This kinematic range is currently not covered by other experimental data in perturbative QCD fits.

Original languageEnglish
Article number396
JournalEuropean Physical Journal C
Volume75
Issue number8
DOIs
StatePublished - 28 Aug 2015
Externally publishedYes

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