# DIS 2015 - XXIII. International Workshop on Deep-Inelastic Scattering and Related Subjects

27 April 2015 to 1 May 2015
US/Central timezone

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

30 Apr 2015, 08:30
25m
BALLROOM EAST ()

### Speaker

Collaboration PROSA (.)

### Description

The impact of recent measurements of heavy-flavour production in deep inelastic electron-proton scattering and in proton-proton 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.

 Slides