Double parton scattering in four-jet production in proton-proton collisions at the LHC

TL;DR

This paper investigates the role of double parton scattering in four-jet production at the LHC, analyzing its significance relative to single scattering and proposing methods to distinguish between them.

Contribution

It provides a detailed analysis of DPS contributions at leading order and with QCD radiation effects, and suggests kinematic cuts to enhance DPS measurement prospects.

Findings

QCD radiation significantly affects theoretical predictions

DPS contributions are more impacted by QCD radiation than SPS

Proposed kinematic cuts improve DPS detection in four-jet events

Abstract

We study the contribution from double parton scattering (DPS) to four-jet production at the LHC, both at the leading order accuracy and after incorporating the effects of QCD radiation. Apart from DPS, we also include and discuss the contribution from single parton scattering (SPS). We find that the QCD radiation impacts theoretical predictions significantly, with DPS contributions more affected than the SPS. We also examine a number of observables in regard to their effectiveness for discrimination between DPS and SPS events and propose sets of kinematical cuts to improve the prospects of measuring DPS in four-jet production.