Direct Bound on the Total Decay Width of the Top Quark in pp̅ Collisions at √s=1.96 TeV
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; ... Show more Show less
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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].
Date issued
2009-01Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear ScienceJournal
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
ISSN
0031-9007