| Abstract
The growth and development of "charged particle jets" produced in
proton-antiproton collisions at 1.8 TeV are studied. The QCD "hard
scattering" Monte-Carlo models describe quite well the properties
of the leading charged particle jet. A number of "global"
observables are examined, where to fit these observable the models have
to describe the entire proton-antiproton event structure correctly. In
particular, the behavior of the "underlying event" in hard scattering
processes is studied in detail. None of these models
(with their default parameters) describe correctly all the properties
of the "underlying event".
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