Direct Bound on the Total Decay Width of the Top Quark in pp̅ Collisions at √s=1.96 TeV
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PhysRevLett_102_042001.pdf
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Author(s)
Choudalakis, Georgios
Gomez-Ceballos, Guillelmo
Hahn, Kristian Allan
Henderson, C.
Knuteson, Bruce O.
Paus, Christoph M. E.
Xie, Si
Bauer, Gerry P
Makhoul, Khaldoun
Date Issued
January 2009
Journal
Phyisical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T. et al. “Direct Bound on the Total Decay Width of the Top Quark in pp-bar Collisions at s=1.96 TeV.” Physical Review Letters 102.4 (2009): 042001. (C) 2010 The American Physical Society.
Version
Final published version
Abstract
We present the first direct experimental bound on the total decay width of the top quark, Γ[subscript t], using 955 pb[superscript -1] of the Tevatron’s pp̅ collisions recorded by the Collider Detector at Fermilab. We identify 253 top-antitop pair candidate events. The distribution of reconstructed top quark mass from these events is fitted to templates representing different values of the top quark width. Using a confidence interval based on likelihood-ratio ordering, we extract an upper limit at 95% C.L. of Γ[subscript t]<13.1 GeV for an assumed top quark mass of 175 GeV/c[superscript 2].
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
http://dx.doi.org/10.1103/PhysRevLett.102.042001
