Dijet Azimuthal Decorrelations in pp Collisions at sqrt(s) = 7 TeV

TL;DR

This paper presents measurements of dijet azimuthal decorrelations in proton-proton collisions at 7 TeV, comparing experimental data with QCD predictions and Monte Carlo simulations to study initial-state gluon radiation effects.

Contribution

First measurement of dijet azimuthal decorrelations at 7 TeV using CMS, providing data to test QCD models and improve understanding of gluon radiation.

Findings

Dijet azimuthal distributions are sensitive to initial-state gluon radiation.

Experimental results are compared with perturbative QCD and Monte Carlo predictions.

Data helps refine models of gluon radiation in high-energy collisions.

Abstract

Measurements of dijet azimuthal decorrelations in pp collisions at sqrt(s) = 7 TeV using the CMS detector at the CERN LHC are presented. The analysis is based on an inclusive dijet event sample corresponding to an integrated luminosity of 2.9 inverse picobarns. The results are compared to predictions from perturbative QCD calculations and various Monte Carlo event generators. The dijet azimuthal distributions are found to be sensitive to initial-state gluon radiation.