Production of four-jets in single- and double-parton scattering within high-energy factorization

TL;DR

This paper investigates four-jet production using high energy factorization, comparing single- and double-parton scattering contributions and demonstrating improved angular correlation descriptions over collinear methods.

Contribution

It presents the first study of 4-jet production within the high energy factorization framework, including both SPS and DPS contributions and comparing to experimental data.

Findings

DPS HEF results are smaller than collinear predictions.

HEF better describes angular correlations among jets.

Kinematical effects explain differences between HEF and collinear approaches.

Abstract

We report on a first study of 4-jet production in a high energy factorization (HEF) framework \cite{Kutak:2016mik,Kutak:2016ukc}. We include and discuss contributions from both single-parton scattering (SPS) and double-parton scattering (DPS) and compare to the measured data. The DPS HEF result is considerably smaller than the one obtained with collinear factorization. The mechanism leading to this difference is of kinematical nature. In contrast to the collinear approach, the HEF approach nicely describes the distribution of the $\Delta S$ variable, which involves all four jets and their angular correlations.