Paper
Impact of heavy-flavour production cross sections measured by the LHCb experiment on parton distribution functions at low x
Authors
Oleksandr Zenaiev, Achim Geiser, Katerina Lipka, Johannes Blümlein, Amanda Cooper-Sarkar, Maria-Vittoria Garzelli, Marco Guzzi, Oleg Kuprash, Sven-Olaf Moch, Pavel Nadolsky, Ringaile Placakyte, Klaus Rabbertz, Ingo Schienbein, Pavel Starovoitov
Abstract
The impact of recent measurements of heavy-flavour production in deep inelastic scattering and in 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 of the proton momentum, down to . This kinematic range is currently not covered by other experimental data in perturbative QCD fits.