Search for Anomalous Kinematics in tt Dilepton Events at CDF Ⅱ

摘要

We report on a search for anomalous kinematics of it dilepton events in pp collisions at s~(1/2) = 1.96 TeV using 193 pb~(-1) of data collected with the CDF Ⅱ detector. We developed a new a priori technique designed to isolate the subset in a data sample revealing the largest deviation from standard model (SM) expectations and to quantify the significance of this departure. In the four-variable space considered, no particular subset shows a significant discrepancy, and we find that the probability of obtaining a data sample less consistent with the SM than what is observed is 1.0%-4.5%.