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Precision Top-Quark Mass Measurement at CDF

Author(s)
Gomez-Ceballos, Guillelmo; Goncharov, Maxim; Paus, Christoph M. E.
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Abstract
We present a precision measurement of the top-quark mass using the full sample of Tevatron √s=1.96  TeV proton-antiproton collisions collected by the CDF II detector, corresponding to an integrated luminosity of 8.7  fb[superscript -1]. Using a sample of tt̅ candidate events decaying into the lepton+jets channel, we obtain distributions of the top-quark masses and the invariant mass of two jets from the W boson decays from data. We then compare these distributions to templates derived from signal and background samples to extract the top-quark mass and the energy scale of the calorimeter jets with in situ calibration. The likelihood fit of the templates from signal and background events to the data yields the single most-precise measurement of the top-quark mass, M[subscript top]=172.85±0.71(stat)±0.85(syst)  GeV/c[superscript 2].
Date issued
2012-10
URI
http://hdl.handle.net/1721.1/75782
Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Precision Top-Quark Mass Measurement at CDF.” Physical Review Letters 109.15 (2012). © 2012 American Physical Society
Version: Final published version
ISSN
0031-9007
1079-7114

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