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Direct Bound on the Total Decay Width of the Top Quark in p(p)over-bar Collisions at root s=1.96 TeV

Aaltonen, T; Adelman, J; Akimoto, T; Albrow, MG; Gonzalez, BA; Amerio, S; Amidei, D; ... Zucchelli, S; + view all (2009) Direct Bound on the Total Decay Width of the Top Quark in p(p)over-bar Collisions at root s=1.96 TeV. PHYS REV LETT , 102 (4) , Article 042001. 10.1103/PhysRevLett.102.042001. Green open access

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Abstract

We present the first direct experimental bound on the total decay width of the top quark, Gamma(t), using 955 pb(-1) of the Tevatron's p (p) over bar 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 Gamma(t) < 13.1 GeV for an assumed top quark mass of 175 GeV/c(2).

Type: Article
Title: Direct Bound on the Total Decay Width of the Top Quark in p(p)over-bar Collisions at root s=1.96 TeV
Open access status: An open access version is available from UCL Discovery
DOI: 10.1103/PhysRevLett.102.042001
Publisher version: http://dx.doi.org/10.1103/PhysRevLett.102.042001
Language: English
Additional information: © 2009 The American Physical Society
Keywords: PHYSICS
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
URI: https://discovery.ucl.ac.uk/id/eprint/342918
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