| Abstract |
We study the behavior of the "underlying event" in hard scattering p-pbar collisions at sqrt{s} = 1.96 TeV and compare with PYTHIA Tune A and with our published Run I analysis. The "underlying event" is studied using both "charged particle jets" (as was done in our Run I analysis) and using "calorimeter jets". As expected the properties of the "underlying event" are the same for both the "charged particle jet" and the "calorimeter jet" approach and both agree with the Run I analysis.
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