Jet Decorrelation and Jet Shapes at the Tevatron
Terry Heuring
Abstract
We present results on measurements of jet shapes and jet azimuthal decorrelation from pp collisions at s=1.8 TeV using data collected during the 1992--1993 run of the Fermilab Tevatron. Jets are seen to narrow both with increasing ET and increasing rapidity. While HERWIG, a parton shower Monte Carlo, predicts slightly narrower jets, it describes the trend of the data well; NLO QCD describes qualitative features of the data but is sensitive to both renormalization scale and jet definitions. Jet azimuthal decorrelation has been measured out to five units of pseudorapidity. While next--to--leading order QCD and a leading--log approximation based on BFKL resummation fail to reproduce the effect, HERWIG describes the data well.
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