Analysis of Charm Pair Production at the LHC

TL;DR

This paper compares DGLAP and CCFM QCD evolution models by analyzing charm pair correlations in 7 TeV proton-proton collisions, finding NLO matched models best fit the LHCb data.

Contribution

It provides a detailed comparison of two QCD evolution approaches and evaluates their effectiveness in describing charm pair production at the LHC.

Findings

NLO matched models best describe the data

Differences in parton kinematics between models are highlighted

DGLAP and CCFM approaches show distinct predictions

Abstract

The DGLAP and CCFM approaches to perturbative QCD evolution have been investigated by examining correlations of charmed hadron pairs in $pp$ collisions at $\sqrt{s}=7$ TeV. The theoretical models are compared to the data taken by the LHCb experiment. Differences in the parton kinematics between the two approaches are discussed. In general a model incorporating NLO diagrams matched to parton showers describes the data best.