Direct Bound on the Total Decay Width of the Top Quark in pp Collisions at {radical}(s)=1.96 TeV

Journal Article · Fri Jan 30 04:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.042001· OSTI ID:21180156

Aaltonen, T; Maki, T; Mehtala, P; Orava, R; Osterberg, K; Saarikko, H; Remortel, N van ^[1]; Adelman, J; Brubaker, E; Fedorko, W T; Grosso-Pilcher, C; Kim, Y K; Krop, D; Kwang, S; Lee, H S; Paramonov, A A; Schmidt, M A; Shiraishi, S; Shochet, M; Wolfe, C ^[2]

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1. Division of High Energy Physics, Department of Physics, University of Helsinki and Helsinki Institute of Physics, FIN-00014, Helsinki (Finland)
2. Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637 (United States)

We present the first direct experimental bound on the total decay width of the top quark, {gamma}{sub t}, using 955 pb{sup -1} of the Tevatron's pp 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}{sub t}<13.1 GeV for an assumed top quark mass of 175 GeV/c{sup 2}.

• OSTI ID: 21180156
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 4 Vol. 102; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
FERMILAB COLLIDER DETECTOR
FERMILAB TEVATRON
GEV RANGE 100-1000
MASS
PARTICLE DECAY
PARTICLE WIDTHS
PROTON-PROTON INTERACTIONS
T QUARKS
TEV RANGE 01-10