1,611 research outputs found
Search for the Top Quark at D0 using Multivariate Methods
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.Comment: 12 pages, http://d0wop.fnal.gov/d0pubs/ppbar95/pushpa.ps Replaced
because the first submission was problemati
Advanced Analysis Methods in High Energy Physics
During the coming decade, high energy physics experiments at the Fermilab
Tevatron and around the globe will use very sophisticated equipment to record
unprecedented amounts of data in the hope of making major discoveries that may
unravel some of Nature's deepest mysteries. The discovery of the Higgs boson
and signals of new physics may be around the corner. The use of advanced
analysis techniques will be crucial in achieving these goals. I will discuss
some of the novel methods of analysis that could prove to be particularly
valuable for finding evidence of any new physics, for improving precision
measurements and for exploring parameter spaces of theoretical models.Comment: 9 pages, 5 figures, To be published in the Proceedings of the VII
International Workshop on Advanced Computing and Analysis Techniques in
Physics Research, Fermilab, Oct. 16-20, 2000 (American Institute of Physics,
NY, 2001) edited by P.C. Bhat and M. Kaseman
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Run II physics at the Fermilab Tevatron and advanced analysis methods
The Fermilab Tevatron has the unique opportunity to explore physics at the electroweak scale with the highest ever proton-antiproton collision energy of {radical}s = 1.96 TeV and unprecedented luminosity. About 20 times more data is expected to be collected during the first phase of the collider Run II which is in its second year of data-taking. The second phase of Run II, expected to begin in 2005, will increase the integrated luminosity to about 10-15 fb{sup -1}. Discovering a low mass Higgs boson and evidence for Supersymmetry or for other new physics beyond the Standard Model are the main physics goals for Run II. It is widely recognized that the use of advanced analysis methods will be crucial to achieve these goals. I discuss the current status of Run II at the Tevatron, prospects and foreseen applications of advanced analysis methods
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