Eur. Phys. J. C (2015) 75: 610
https://doi.org/10.1140/epjc/s10052-015-3814-x

Regular Article - Theoretical Physics

Gluon PDF constraints from the ratio of forward heavy-quark production at the LHC at and 13 TeV

¹ Université Paris Diderot, 75013, Paris, France
² Sorbonne Universités, UPMC Univ Paris 06, UMR 7589, LPTHE, 75005, Paris, France
³ UMR 7589, LPTHE, CNRS, 75005, Paris, France
⁴ PH-TH, CERN, 1211, Geneva, Switzerland
⁵ INFN, Sezione di Milano Bicocca, Piazza della Scienza 3, 20126, Milan, Italy

^* e-mail: cacciari@lpthe.jussieu.fr

Received: 8 September 2015
Accepted: 26 November 2015
Published online: 22 December 2015

Abstract

We discuss production of charm and bottom quarks at forward rapidity in pp collisions at the LHC, updating the QCD predictions for the run at  TeV. We show that, while the absolute rates suffer from large theoretical systematics, dominated by scale uncertainties, the increase relative to the rates precisely measured at 7 TeV can be predicted with an accuracy of a few percent, sufficient to highlight the sensitivity to the gluon distribution function.