Double parton effects for jets with large rapidity separation

TL;DR

This paper investigates double-parton scattering effects in four-jet production with large rapidity separation at the LHC, showing how DPS contribution increases with rapidity gap, energy, and decreasing jet transverse momentum, and compares calculations with experimental data.

Contribution

It introduces a detailed analysis of DPS effects in four-jet events with large rapidity gaps, using LO collinear and $k_t$-factorization approaches, and compares results with LHC data.

Findings

DPS contribution grows with rapidity separation, energy, and decreasing jet transverse momentum.

LO pQCD provides a reasonable description of CMS and ATLAS inclusive jet data.

Angular correlations are analyzed within the $k_t$-factorization framework.

Abstract

We discuss production of four jets $pp \rightarrow j j j j X$ with at least two jets with large rapidity separation in proton-proton collisions at the LHC through the mechanism of double-parton scattering (DPS). The cross section is calculated in a factorizaed approximation. Each hard subprocess is calculated in LO collinear approximation. The LO pQCD calculations are shown to give a reasonably good descritption of CMS and ATLAS data on inclusive jet production. It is shown that relative contribution of DPS is growing with increasing rapidity distance between the most remote jets, center-of-mass energy and with decreasing (mini)jet transverse momenta. We show also result for angular azimuthal dijet correlations calculated in the framework of $k_t$-factorization approaximation.