Comparison of Three-jet Events in Proton-Antiproton Collisions at sqrt{s}=1.8 TeV to Predictions from a Next-to-leading Order QCD Calculation

Abstract

The properties of three-jet events with total transverse energy greater than 320 GeV and individual jet energy greater than 20 GeV have been analyzed and compared to absolute predictions from a next-to-leading order (NLO) perturbative QCD calculation. These data, of integrated luminosity 86 pb^-1, were recorded by the CDF Experiment for proton-antiproton collisions at sqrt{s}=1.8 TeV. This study tests a model of higher order QCD processes that result in gluon emission and can be used to estimate the magnitude of the contribution of processes higher than NLO. The total cross section is measured to be 466 \pm 3(stat.)^{+207}_{-70}(syst.) pb. The differential cross section is furthermore measured for all kinematically accessible regions of the Dalitz plane, including those for which the theoretical prediction is unreliable. While the measured cross section is consistent with the theoretical prediction in magnitude, the two differ somewhat in shape in the Dalitz plane.

arXiv commentFor the CDF Collaboration. Contributed to the proceedings of the Eleventh High-Energy Physics International Conference on QCD, Montpellier, France, July 2004

References in corpus (8)

• Improved Parton Distributions from Global Analysis of Recent Deep Inelastic Scattering and Inclusive Jet Data
• Inclusive jet cross section in $\bar{p}p$ collisions at $\sqrt{s}=1.8$ TeV
• Two-loop QCD corrections to massless quark-gluon scattering
• Two-loop QCD corrections to massless identical quark scattering
• Measurement of Dijet Angular Distributions at CDF
• Next-to-Leading Order Gluonic Three Jet Production at Hadron Colliders
• Further Properties of High-Mass Multijet Events at the Fermilab Proton-Antiproton Collider
• The Analysis of Multijet Events Produced at High Energy Hadron Colliders