Bulletin of the American Physical Society
2006 APS April Meeting
Saturday–Tuesday, April 22–25, 2006; Dallas, TX
Session S13: Top Quark Production |
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Sponsoring Units: DPF Chair: David Cline, University of California, Los Angeles Room: Hyatt Regency Dallas Cumberland G |
Monday, April 24, 2006 3:30PM - 3:42PM |
S13.00001: Measurement of the ttbar production cross section at D0 using dilepton events Susan Burke We report on the measurement of the ttbar production cross section with candidate events in the dilepton final state. The ttbar signal is discriminated from background processes by requiring two identified leptons and using kinematic criteria that exploits the presence of neutrinos and energetic jets in ttbar events. [Preview Abstract] |
Monday, April 24, 2006 3:42PM - 3:54PM |
S13.00002: Measurement of the ttbar production cross section at D0 using lepton + track events Dmitri Denisov We report on the measurement of the ttbar production cross section with candidate events in the dilepton final state in which only one of the leptons satisfies our usual identification criteria, while the other appears as an isolated charged track. The ttbar signal is discriminated from background processes by requiring at least one b-tagged jet and using kinematic criteria that exploits the presence of neutrinos and energetic jets in ttbar events. [Preview Abstract] |
Monday, April 24, 2006 3:54PM - 4:06PM |
S13.00003: Top Dilepton Cross Section Measurement Using the Tight Lepton+Isolated Track Sample Corrinne Mills We present a top pair production cross section measurement in the dilepton channel using 750$ pb^{-1}$ of Run II data. We select events with one well- identified lepton, an isolated track, and a significant amount of missing transverse energy. The expected and observed numbers of events with 0 and 1 jets, where background is the dominant contribution, agree well. We measure the top dilepton cross section for events with 2 or more jets and show the kinematic distributions of the signal sample compared to the Standard Model expectation. [Preview Abstract] |
Monday, April 24, 2006 4:06PM - 4:18PM |
S13.00004: Measurement of the ttbar production cross section at D0 using b tagging Florent Chevallier We report on the measurement of the ttbar production cross section using candidate events in the lepton plus jets final state. The ttbar signal is discriminated from background processes by the requirement of one or more identified b jets. [Preview Abstract] |
Monday, April 24, 2006 4:18PM - 4:30PM |
S13.00005: Top Pair Production Cross Section Measurement in Lepton+Jets Channel Using Jet Probability b-Tagging Enrique Palencia We present a preliminary measurement of the $t\bar t$ pair production cross section in the collisions of protons and anti-protons at 1.96~TeV using 320 pb$^{-1}$ of data collected by the Collider Detector at Fermilab (CDF). The measurement uses $t\bar t$ decays into final states which contain one high transverse momentum lepton, high missing transverse energy and multiple jets, where one of the jets is required to be identified as a $b$-jet candidate from the information of the track's impact parameter resolution using the SVXII Silicon Vertex detector. The performance of the tagging algorithm used in this analysis (Jet Probability) is also discussed. [Preview Abstract] |
Monday, April 24, 2006 4:30PM - 4:42PM |
S13.00006: Precision Measurement of $t\bar t$ Production Cross Section using Lepton+Jets Events with Advanced b-Tagging Techniques Michael McFarlane We present the measurement of the $t\bar t$ production cross section using events with one charged lepton and jets from $p\bar p$ collisions at $\sqrt{s} =1.96$ TeV. In these events heavy flavor quarks from top quark decay are identified using advanced multivariate b-tagging technique with the existing secondary vertex taggers SecVtx and JetProb, as well as other jet kinematic variables. The measurement uses the data collected up to Fall 2005 by the Collider Detector at Fermilab (CDF), which corresponds to an integrated luminosity of about $700$ pb$^{-1}$. Results are consistent with Standard Model $t\bar t$ production. [Preview Abstract] |
Monday, April 24, 2006 4:42PM - 4:54PM |
S13.00007: Measurement of the ttbar production cross section at D0 using kinematic information Su-Jung Park We report on the measurement of the ttbar production cross section using candidate events in the lepton plus jets final state. The ttbar signal is discriminated from background processes using kinematic information. Several kinematic variables are combined into a multivariate discriminant to maximize the separation between signal and background. [Preview Abstract] |
Monday, April 24, 2006 4:54PM - 5:06PM |
S13.00008: Measurement of the ttbar production cross section at D0 using all-hadronic events Marc-Andre Pleier We report on the measurement of the ttbar production cross section with candidate events in the all-hadronic final state. The ttbar signal is discriminated from the QCD multijet background process by requiring at least one b-tagged jet and by using kinematic criteria. Several kinematic criteria are combined into a neural network to maximize the discrimination between signal and background. [Preview Abstract] |
Monday, April 24, 2006 5:06PM - 5:18PM |
S13.00009: NLO Studies of Electroweak Production of Top Quarks Jorge A. Benitez, Raymond Brock, Reinhard Schwienhorst, Qing-Hong Cao, C.-P. Yuan We have studied the effect of NLO calculations in the separation of the S and T channels for the electroweak production of top quarks. To find correlations among the different variables, we have used not only the well-known topological and kinematical variables, but also some functions which explore symmetry properties of the angular distributions. [Preview Abstract] |
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