Inclusive Four-jet Production at 7 and 13 TeV: Azimuthal Profile in Multi-Regge Kinematics

TL;DR

This paper extends the study of azimuthal correlations in inclusive multi-jet events at the LHC to four-jet configurations, proposing new observables to probe BFKL dynamics in multi-Regge kinematics.

Contribution

It introduces a novel analysis framework for four-jet events with specific rapidity configurations, incorporating BFKL gluon Green functions to study azimuthal correlations.

Findings

Proposes new azimuthal correlation ratios as BFKL probes

Extends previous three-jet observables to four-jet events

Provides a theoretical basis for future experimental analysis

Abstract

Recently, new observables in LHC inclusive events with three tagged jets were proposed. Here, we extend that proposal to events with four tagged jets. The events are characterised by one jet in the forward direction, one in the backward direction with a large rapidity distance $Y$ from the first one and two more jets tagged in more central regions of the detector. In our setup, non-tagged associated mini-jet multiplicity is present and needs to be accounted for by the inclusion of BFKL gluon Green functions. The projection of the cross section on azimuthal-angle components opens up the opportunity for defining new ratios of correlation functions of the azimuthal angle differences among the tagged jets that can be used as probes of the BFKL dynamics.