Precision measurement of the ratio ${\rm B}(t \to Wb)/{\rm B}(t \to Wq)$ and Extraction of $V_{tb}$
(2011) Physical Review Letters — Vol. 107 (2011)
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- Abstract
- We present a measurement of the ratio of top quark branching fractions R = B(t -> Wb)/B(t -> Wq), where q can be a d, s or b quark, in the lepton+jets and dilepton ttbar final states. The measurement uses data from 5.4 fb-1 of ppbar collisions collected with the D0 detector at the Fermilab Tevatron Collider. We measure R = 0.90 +/- 0.04, and we extract the CKM matrix element |Vtb| as |Vtb| = 0.95 +/- 0.02, assuming unitarity of the 3x3 CKM matrix.
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Citations
Tanasijczuk, A. J., D0, & et al. (2011). Precision measurement of the ratio ${\rm B}(t \to Wb)/{\rm B}(t \to Wq)$ and Extraction of $V_{tb}$. Physical Review Letters, 107. https://doi.org/10.1103/PhysRevLett.107.121802 (Original work published 2011)