Direct Bound on the Total Decay Width of the Top Quark in pp̅ Collisions at √s=1.96  TeV

Direct Bound on the Total Decay Width of the Top Quark in pp̅ Collisions at √s=1.96  TeV

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...

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Bibliographic Details
Main Authors: Choudalakis, Georgios, Gomez-Ceballos, Guillelmo, Hahn, Kristian Allan, Henderson, C., Knuteson, Bruce O., Paus, Christoph M. E., Xie, Si, Bauer, Gerry P, Makhoul, Khaldoun
Other Authors: Massachusetts Institute of Technology. Department of Physics
Format: Article
Language:en_US
Published: American Physical Society 2010
Online Access:http://hdl.handle.net/1721.1/51352
https://orcid.org/0000-0002-6047-4211
Description
Summary: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].

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