Search for the Top Quark at D0 using Multivariate Methods

Details Search for the Top Quark at D0 using Multivariate Methods Search for the Top Quark at D0 using Multivariate Methods

1995-07-14

arxiv.org/abs/hep-ex/9507007v2

AIP Conf.Proc.357:308-319,1996

Physics

High Energy Physics

High Energy Physics - Experiment

12 pages, http://d0wop.fnal.gov/d0pubs/ppbar95/pushpa.ps Replaced because the first submission was problematic

Scientific paper

10.1063/1.49675

We report on the search for the top quark in proton-antiproton collisions at the Fermilab Tevatron in the di-lepton and lepton+jets channels using multivariate methods. An H-matrix analysis of the e-mu data corresponding to an integrated luminosity of about 13.5 pb-1 yields one event with a likelihood to be a top event (assuming top mass of 180 GeV/c**2) that is 10 times more than WW and 18 times more than Z -> tau tau. A neural network analysis of e+jets channel with about 48 pb-1 of data shows an excess of events in the signal region and yields a cross-section for top-antitop production of 6.7 +/- 2.3(stat.) pb, assuming a top mass of 200 GeV/c**2. A PDE analysis of e+jets data gives results consistent with the above.

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