Top Quark Production Dynamics in Qcd *
نویسنده
چکیده
A calculation of the total cross section for top quark production in hadronhadron collisions is presented based on an all-orders perturbative resummation of initial-state gluon radiative contributions to the basic quantum chromodynamics subprocesses. Principal-value resummation is used to evaluate all relevant large threshold contributions. In this method there are no arbitrary infrared cutoffs, and the perturbative regime of applicability is well defined, two attributes that significantly reduce the estimated uncertainty of the results. For pp̄ collisions at center-of-mass energy √ s = 1.8 TeV and a top mass of 175 GeV, we obtain σ(tt̄) = 5.52 −0.45pb, in agreement with experiment. Predicted cross sections are provided as a function of top mass in pp̄ collisions at √ s = 2.0 TeV and in pp collisions at CERN LHC energies.
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