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First Measurement of the Ratio B(t→Wb)/B(t→Wq) and Associated Limit on the Cabibbo-Kobayashi-Maskawa Element |Vtb|

ContributorsCDF Collaboration
Published inPhysical review letters, vol. 86, no. 15, p. 3233-3238
Publication date2001
Abstract

We present the first measurement of the ratio of branching fractions R≡B(t→Wb)/B(t→Wq) from pp¯ collisions at s√=1.8TeV. The data set corresponds to 109pb−1 of data recorded by the Collider Detector at Fermilab during the 1992–95 Tevatron run. We measure R=0.94+0.31−0.24(stat+syst) or R>0.61 (0.56) at 90% (95)% C.L., in agreement with the standard model predictions. This measurement yields a limit on the Cabibbo-Kobayashi-Maskawa quark mixing matrix element |Vtb| under the assumption of three generations and unitarity.

Citation (ISO format)
CDF Collaboration. First Measurement of the Ratio <em>B(t→Wb)/B(t→Wq)</em> and Associated Limit on the Cabibbo-Kobayashi-Maskawa Element |<em>V</em><sub>tb</sub>|. In: Physical review letters, 2001, vol. 86, n° 15, p. 3233–3238. doi: 10.1103/PhysRevLett.86.3233
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ISSN of the journal0031-9007
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