The growth and development of charged particle jets produced in
proton-antiproton collisions at 1.8 TeV are studied. We see evidence of
charged particle clusters (i.e., charged particle jets) in the Min-Bias
data, which are consistent with a smooth continuation (down to small p(t)) of
the high transverse momentum charged jets observables are compared with the
QCD hard scattering Monte-Carlo models HERWIG, ISAJET, and PYTHIA. The
models describe fairly well the multiplicity distribution of charged
particles within the leading charged jet, the size of the leading charged
jet, the radial distribution of charged particles and transverse momentum
around the leading charged jet direction, and the momentum distribution of
charged particles within the leading charged jet. Also, a number of global
observables are examined, where to fit the observable the QCD Monte-Carlo
models have to describe correctly the overall proton-antiproton event
structure. In particular, we study the behavior of the underlying event in
hard scattering processes. None of the QCD models we examined (with its
default parameters) describes correctly all the properties of the underlying
event.
Return to top of page.
Go to Physics Results
Updated: Wednesday, 2002 June 19 13:44:22 CDT automatically from input from Carol Picciolo