Search

We use a new method, the Matrix Element Method, to measure the tt¯ production cross section at Tevatron RunII, in the electron + jets channel. We tested this method with Monte Carlo analysis with two approaches, using the Direct Likelihood Function and the Discriminator Likelihood Function, respectively. Data analysis is carried out using the Direct Likelihood Function, with 106.79 pb-1 of data collected by the DO Experiment. Of the 50 events that pass our selection cuts, the method finds the fraction of signal events to be 0.170. The total cross section is determined to be 7.33 +/- 4.01 stat.+2.13 -2.17 (sys.) pb.