Measurement of the Energy Dependence of Alpha_s

CDF Collaboration
Proposed Speaker: Christina Mesropian
Abstract
The results from the CDF collaboration using data from the 1993-1995 Tevatron Collider run are presented. The statistical uncertainties are significantly reduced relative to the previous results and experimental systematics are comparable with the uncertainties in the theoretical predictions. Despite observed discrepancies with theory, which could be accommodated by modifications of parton distribution functions, the inclusive jet cross section could be described by perturbative Quantum Chromodynamics. The strong coupling constant is measured from the inclusive jet cross section. This is the first measurement which tests the running of alpha_s over such a wide kinematical range in a single experiment from 40 to 450 GeV. The results demonstrate very good agreement with the QCD predictions.