Speaker
Prof.
Richard Dryden Field
(University of Florida (US))
Description
We study the behavior of the underlying event in proton-antiproton collisions at 300 GeV, 900 GeV, and 1.96 TeV using charged particles measured by the CDF detector. The charged particle density and the scalar PTsum density in the transverse region as defined by the leading charged particle, PTmax, are examined as a function of PTmax at the three center-of-mass energies. The data at 300 GeV and 900 GeV were taken just before the shutdown of the Tevatron. The 900 GeV results are compared directly with similar studies at the LHC and combining Tevatron and LHC results allows for a mapping out of the energy dependence of the underlying event at 300 GeV, 900 GeV, 1.96 TeV, and 7 TeV. We also examine the ability of the QCD Monte-Carlo models to simultaneously describe the behavior of the underlying event at all four center-of-mass energies.
Author
Prof.
Richard Dryden Field
(University of Florida (US))
