Search for the Top Quark at D0 using Multivariate Methods

Conference · Mon May 12 04:00:00 EDT 2008 · AIP Conf.Proc.

DOI:https://doi.org/10.1063/1.49675· OSTI ID:106494

Bhat, Pushpalatha C. ^[1]

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1. Fermilab

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.

• Research Organization: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
• Contributing Organization: D0
• DOE Contract Number: AC02-07CH11359
• OSTI ID: 106494
• Report Number(s): FERMILAB-CONF-95-211-E; arXiv:hep-ex/9507007; oai:inspirehep.net:397581
• Conference Information: Journal Name: AIP Conf.Proc. Journal Volume: 357
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CORRELATIONS
FLAVOR MODEL
JETS
LEPTONS
MULTIVARIATE ANALYSIS
NEURAL NETWORKS
PARTICLE PRODUCTION
PROTON-ANTIPROTON INTERACTIONS
QUARKS
TEV RANGE 01-10