Kinematic evidence for top quark production in lepton + multijet events

The authors present the results of a kinematic analysis of events containing a lepton, missing transverse energy and jets to search for top quark production. The search uses 19.3 pb-1 of data collected at the Collider Detector at Fermilab (CDF) during the 1992-93 run plus data from the Tevatron run in progress. The analysis exploits the kinematic differences between top events and the principle background, QCD W + multijet events, to isolate a sample with improved top signal to background. Using this sample they estimate the probability that the kinematics of the observed events are due to background processes alone