Study of Jet Shapes in Inclusive Jet Production in ppbar Collisions at sqrt{s} = 1.96 TeV

Abstract

We report on a study of jet shapes in inclusive jet production in $p\bar{p}$ collisions at $\sqrt{s}=1.96\mathrm{TeV}$ using the upgraded Collider Detector at Fermilab in Run II (CDF II) based on an integrated luminosity of $170\mathrm{p}{\mathrm{b}}^{-1}$. Measurements are carried out on jets with rapidity $0.1<|Y^{\mathrm{jet}}|<0.7$ and transverse momentum 37 GeV/c $<P_T^{\mathrm{jet}}<380$ GeV/c. The jets have been corrected to the hadron level. The measured jet shapes are compared to leading-order QCD parton-shower Monte Carlo predictions as implemented in the PYTHIA and HERWIG programs. PYTHIA, tuned to describe the underlying event as measured in CDF Run I, provides a better description of the measured jet shapes than does PYTHIA or HERWIG with their default parameters.

arXiv comment27 pages, 9 figures, Accepted by PRD

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