Multivariate searches for single top quark production with the D0 detector

Abstract

We present a search for electroweak production of single top quarks in the s-channel (p-pbar -> t bbar + X) and t-channel (p-pbar -> tq bbar + X) modes. We have analyzed 230 pb^(-1) of data collected with the D0 detector at the Fermilab Tevatron collider at a center-of-mass energy of sqrt(s) = 1.96 TeV. Two separate analysis methods are used: neural networks and a cut-based analysis. No evidence for a single top quark signal is found. We set 95% confidence level upper limits on the production cross sections using Bayesian statistics, based on event counts and binned likelihoods formed from the neural network output. The limits from the neural network (cut-based) analysis are 6.4 pb (10.6 pb) in the s-channel and 5.0 pb (11.3 pb) in the t-channel.

submitted to Phys. Rev. D, Fermilab preprint Fermilab-Pub-06/069-E

References in corpus (35)

• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• High-Energy-Physics Event Generation with PYTHIA 6.1
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Observation of Top Quark Production in Pbar-P Collisions
• Global QCD Analysis of Parton Structure of the Nucleon: CTEQ5 Parton Distributions
• Observation of the Top Quark
• An update on vector boson pair production at hadron colliders
• The Upgraded D0 Detector
• CompHEP 4.4 - Automatic Computations from Lagrangians to Events
• NLL resummation of the heavy-quark hadroproduction cross-section
• The t-tbar cross-section at 1.8 and 1.96 TeV: a study of the systematics due to parton densities and scale dependence
• Single Top Production as a Window to Physics Beyond the Standard Model
• The fully differential single-top-quark cross section in next-to-leading order QCD
• Next-to-next-to-leading order soft-gluon corrections in top quark hadroproduction
• Single top production and decay at next-to-leading order
• Angular Correlations in Top Quark Pair Production and Decay at Hadron Colliders
• Understanding single-top-quark production and jets at hadron colliders
• Single-Top-Quark Production via W-Gluon Fusion at Next-to-Leading Order
• Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA
• QCD and Yukawa corrections to single-top-quark production via q qbar -> t bbar
• Improved Spin Basis for Angular Correlation Studies in Single Top Quark Production at the Tevatron
• Single top quarks at the Fermilab Tevatron
• Spin Correlations in Top-Quark Pair Production at $e^{+}{e}^{-}$ Colliders
• Next-to-Leading Order Corrections to Single Top Quark Production and Decay at the Tevatron: 2. $t$-channel Process
• Extraction of the Width of the W Boson from Measurements of sigma(ppbar->W+X)B(W->e nu) and sigma(ppbar->Z+X)B(Z->e e) and their Ratio
• Next-to-Leading Order Corrections to Single Top Quark Production and Decay at the Tevatron: 1. s-channel Process
• General Analysis of Single Top Production and W Helicity in Top Decay
• Search for Single Top Quark Production at DZero Using Neural Networks
• Search for Single-Top-Quark Production in p-pbar Collisions at sqrt(s)=1.8 TeV
• Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt{s} = 1.96 TeV using Kinematic Characteristics of Lepton + Jets Events
• Search for single top quark production in ppbar collisions at sqrt(s)=1.96 TeV
• Search for Electroweak Production of Single Top Quarks in ppbar Collisions
• Search for electroweak single top quark production in ppbar collisions at sqrt{s}=1.96 TeV
• Spin Effects in Processes of Single Top Quark Production at Hadron Colliders
• Optimized Neural Networks to Search for Higgs Boson Production at the Tevatron

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• Evidence for production of single top quarks
• Single top quark production and decay in the t-channel at next-to-leading order at the LHC
• The Matrix Element Method and its Application to Measurements of the Top Quark Mass
• Search for production of single top quarks via $tcg$ and $tug$ flavor-changing neutral current couplings
• Search for production of single top quarks via flavor-changing neutral currents at the Tevatron
• Status and Prospects of Top-Quark Physics
• Review of Top Quark Physics Results
• Review of Properties of the Top Quark from Measurements at the Tevatron
• Observation of Single Top Quark Production at the Tevatron Collider
• Properties of the Top Quark
• Search for the Standard Model Higgs Boson in the H -> WW -> lepton+neutrino+q'qbar Decay Channel
• Observation of Single Top Quark Production