DD-pair production in the parton Reggeization approach taking into account single and double parton scattering scenarios

TL;DR

This paper calculates $DD$-pair production cross sections at 7 and 13 TeV using the parton Reggeization approach, incorporating single and double parton scattering, and compares results with LHCb data.

Contribution

It introduces a comprehensive calculation method for $DD$-pair production considering both scattering mechanisms within the parton Reggeization framework.

Findings

Double parton scattering contribution is significant in $DD$-pair production.

The effective cross section parameter $\sigma_{eff}$ is determined to be approximately 11.5 mb.

Model results agree with LHCb experimental data at 7 TeV.

Abstract

The paper presents the results of calculations of the cross sections for the production of $DD$-pairs at centre-of-mass energies $\sqrt{s}=7$ and $13$ TeV in the parton Reggeization approach. The contribution of both single and double parton scattering is taken into account. To describe the non-perturbative effects of $c$-quark hadronization into $D$-mesons, a fragmentation model with the Peterson fragmentation function is used. The parameter $\sigma_{eff}=11.5^{+0.6}_{-0.5}$ mb, which determines the contribution of the double parton scattering mechanism, is fixed on the basis of a comparison with the available LHCb collaboration experimental data on the $D$-meson pairs production at $\sqrt{s}=7$ TeV.