Measurement of B(t → Wb)/B(t → Wq) in Top-Quark-Pair Decays Using Dilepton Events and the Full CDF Run II Data Set
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Aaltonen-2014-Measurement of B.pdf
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Author(s)
Gomez-Ceballos, Guillelmo
Goncharov, Maxim
Paus, Christoph M. E.
Date Issued
June 2014
Journal
Physical Review Letters
Publisher
American Physical Society
Citation
Aaltonen, T., S. Amerio, D. Amidei, A. Anastassov, A. Annovi, J. Antos, G. Apollinari, et al. “Measurement of B(t → Wb)/B(t → Wq) in Top-Quark-Pair Decays Using Dilepton Events and the Full CDF Run II Data Set.” Physical Review Letters 112, no. 22 (June 2014). © 2014 American Physical Society
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Final published version
Abstract
We present a measurement of the ratio of the top-quark branching fractions R =B (t → Wb)/B(t → Wq), where q represents any quark flavor, in events with two charged leptons, imbalance in total transverse energy, and at least two jets. The measurement uses proton-antiproton collision data at center-of-mass energy 1.96 TeV, corresponding to an integrated luminosity of 8.7 fb[superscript −1] collected with the Collider Detector at Fermilab during Run II of the Tevatron. We measure R to be 0.87 ± 0.07, and extract the magnitude of the top-bottom quark coupling to be |V[subscript tb]| = 0.93 ± 0.04, assuming three generations of quarks. Under these assumptions, a lower limit of |V[subscript tb]| > 0.85(0.87) at 95% (90%) credibility level is set.
MIT Department
Massachusetts Institute of Technology. Department of Physics
Massachusetts Institute of Technology. Laboratory for Nuclear Science
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.112.221801
