Triple parton scattering effects in $D$-meson production at the LHC

Abstract

We study triple-parton scattering effects in open charm production in proton-proton collisions at the LHC. Predictions for one, two and three $c\bar{c}$ pairs production are given for $\sqrt{s}=7$ TeV and $\sqrt{s}=13$ TeV. Quite large cross sections, of the order of milibarns, for the triple-parton scattering mechanism are obtained. We suggest a measurement of three $D^0$ or three $\overline{D^0}$ mesons by the LHCb collaboration. The predicted visible cross sections are of the order of a few nanobarns. The counting rates including $D^0\to K^{-}{\pi }^{+}$ branching fractions are also given. We predict that at $\sqrt{s}=13$ TeV a few thousands of events of triple-$D^0$ production can be observed by the LHCb collaboration.

Comments: talk given by R. Maciula at the 17th Conference on Elastic and Diffractive Scattering, EDS Blois 2017, 26th - 30th June 2017, Prague, Czech Republic