The first measurement of the top quark mass at CDF II in the lepton+jets and dilepton channels simultaneously

Abstract

We present a measurement of the mass of the top quark using data corresponding to an integrated luminosity of 1.9fb^-1 of ppbar collisions collected at sqrt{s}=1.96 TeV with the CDF II detector at Fermilab's Tevatron. This is the first measurement of the top quark mass using top-antitop pair candidate events in the lepton + jets and dilepton decay channels simultaneously. We reconstruct two observables in each channel and use a non-parametric kernel density estimation technique to derive two-dimensional probability density functions from simulated signal and background samples. The observables are the top quark mass and the invariant mass of two jets from the W decay in the lepton + jets channel, and the top quark mass and the scalar sum of transverse energy of the event in the dilepton channel. We perform a simultaneous fit for the top quark mass and the jet energy scale, which is constrained in situ by the hadronic W boson mass. Using 332 lepton + jets candidate events and 144 dilepton candidate events, we measure the top quark mass to be mtop=171.9 +/- 1.7 (stat. + JES) +/- 1.1 (syst.) GeV/c^2 = 171.9 +/- 2.0 GeV/c^2.

submitted to Phys. Rev. D

References in corpus (28)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
• The Cosmological Parameters 2006
• Big-Bang nucleosynthesis (Particle Data Group mini-review)
• HERWIG 6.5: an event generator for Hadron Emission Reactions With Interfering Gluons (including supersymmetric processes)
• 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
• MadEvent: Automatic Event Generation with MadGraph
• Measurement of the J/Psi Meson and b-Hadron Production Cross Sections in ppbar Collisions at sqrt s = 1960 GeV
• Matching matrix elements and shower evolution for top-quark production in hadronic collisions
• Kernel Estimation in High-Energy Physics
• Evidence for Top Quark Production in $\bar{p}p$ Collisions at $\sqrt{s}=1.8$ TeV
• Determination of the Jet Energy Scale at the Collider Detector at Fermilab
• The t-tbar cross-section at 1.8 and 1.96 TeV: a study of the systematics due to parton densities and scale dependence
• Measurement of the ttbar Production Cross Section in ppbar Collisions at sqrt{s}=1.96 TeV using Lepton + Jets Events with Secondary Vertex b-tagging
• Top Production: Sensitivity to New Physics
• Measurements of Inclusive W and Z Cross Sections in p-pbar Collisions at sqrt{s} =1.96 TeV
• Top Quark Mass Measurement Using the Template Method in the Lepton + Jets Channel at CDF II
• Measurement of the Top Quark Mass in the Dilepton Channel
• Measurement of the $t\bar{t}productioncrosssectionin$p\bar{p}$collisionsat$\sqrt{s}$ = 1.8 TeV
• Precise measurement of the top quark mass from lepton+jets events at D0
• Measurement of the Top Quark Mass using Template Methods on Dilepton Events in Proton-Antiproton Collisions at sqrt(s)=1.96 TeV
• Study of ttbar Production in ppbar Collisions Using Total Transverse Energy
• W Charge Asymmetry Measurement in CDF Run 2

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