Studies of Topological Distributions of the Three- and Four-Jet Events in $\pp$ Collisions at $\sqrt{s}=1800$ GeV with the D{\O}Detector

TL;DR

This paper analyzes the topological distributions of three- and four-jet events in proton-antiproton collisions at 1800 GeV, comparing experimental data with QCD predictions and Monte Carlo simulations to test theoretical models.

Contribution

It provides a detailed comparison of measured jet topologies with tree-level QCD calculations and evaluates the performance of Monte Carlo generators.

Findings

QCD predictions agree well with data

Topological distributions are similar across subprocesses

Monte Carlo generators are less accurate

Abstract

The global topologies of inclusive three-- and four--jet events produced in $\pp$ interactions are described. The three-- and four--jet events are selected from data recorded by the D{\O}detector at the Tevatron Collider operating at a center--of--mass energy of $\sqrt{s} = 1800$ GeV. The measured, normalized distributions of various topological variables are compared with parton--level predictions of tree--level QCD calculations. The parton--level QCD calculations are found to be in good agreement with the data. The studies also show that the topological distributions of the different subprocesses involving different numbers of quarks are very similar and reproduce the measured distributions well. The parton shower Monte Carlo generators provide a less satisfactory description of the topologies of the three-- and four--jet events.