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.
Highlights
TeV using the Compact Muon Solenoid (CMS) detector at the CERN LHC are presented
The results are compared to predictions from perturbative quantum chromodynamics (QCD) calculations and various Monte Carlo event generators
I.e., the deviation of Á’dijet from for the two leading jets in hard-scattering events, can be used to study QCD radiation effects over a wide range of jet multiplicities without the need to measure all the additional jets. Such studies are important because an accurate description of multiple-parton radiation is still lacking in perturbative QCD
Summary
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 pbÀ1. I.e., the deviation of Á’dijet from for the two leading jets in hard-scattering events, can be used to study QCD radiation effects over a wide range of jet multiplicities without the need to measure all the additional jets. The Á’dijet distributions are corrected for event migration effects due to the finite jet pT and position resolutions of the detector.
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