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 pp-bar 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 +/- 3(stat.) 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.
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Updated: Thursday, 2005 May 26 10:21:07 CDT automatically from input from Carol Picciolo