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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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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].
Date issued
2009-01
URI
http://hdl.handle.net/1721.1/51352
Department
Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Laboratory for Nuclear Science
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
ISSN
0031-9007

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