Identification of a sample of e+e- -> qq Events For the Precise Measurement of AlphaS in High Energy Electron Positron Colliders
Bruce A. Schumm
Abstract
Based on the PYTHIA physics simulation package, and a fast simulation of the proposed detector for the Next Linear Collider, a set of cuts is identified which leads to a sample of e+e- -> qq events appropriate for the precise measurement of alphas in e+e- annihilation at sqrt(s) = 500 GeV/c2. Using these cuts, the systematic uncertainty on alphas associated with correcting for selection cut biases and remaining non-e+e- -> qq (q = t) contamination is expected to be less than +/- 1%. This work was done as part of a study of the prospects for the precise measurement of alphas at future High Energy Physics facilities, undertaken for the 1996 Snowmass Workshop on New Directions in High Energy Physics.
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