Low x gluons determined by open charm production

E. G. de Oliveira, A. D. Martin, M. G. Ryskin

We use the LHCb data on the forward production of $D$ mesons at 7, 13 and 5 TeV to make a direct determination of the gluon distribution, $xg$, at NLO in the $10^{-5} \lesssim x \l…