# EPS HEP 2015

22-29 July 2015
Europe/Vienna timezone

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

Jul 24, 2015, 10:15 AM
15m
HS32

### Speaker

Katerina Lipka (Deutsches Elektronen-Synchrotron (DE))

### Description

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.