Abstract
We present a measurement of the ratio of the top-quark branching fractions , where 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 collected with the Collider Detector at Fermilab during Run II of the Tevatron. We measure to be , and extract the magnitude of the top-bottom quark coupling to be , assuming three generations of quarks. Under these assumptions, a lower limit of at 95% (90%) credibility level is set.
- Received 13 April 2014
DOI:https://doi.org/10.1103/PhysRevLett.112.221801
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