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Precision measurement of the ratio B(t→Wb)/B(t→Wq) and Extraction of Vtb
Wilson, Graham Wallace Abazov, V. M. Abbott, B. Acharya, B. S. Adams, M. Alexeev, G. D. Alkhazov, G. Alton, A.
Wilson, Graham Wallace
Abazov, V. M.
Abbott, B.
Acharya, B. S.
Adams, M.
Alexeev, G. D.
Alkhazov, G.
Alton, A.
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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 tt¯ final states. The measurement uses data from 5.4 fb−1 of pp¯ collisions collected with the D0 detector at the Fermilab Tevatron Collider. We measure R=0.90±0.04, and we extract the Cabibbo-Kobayashi-Maskawa (CKM) matrix element |Vtb| as |Vtb|=0.95±0.02, assuming unitarity of the 3×3 CKM matrix.
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This is the published version, also available here: http://dx.doi.org/10.1103/PhysRevLett.107.121802.
Date
2011-09-16
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American Physical Society
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V. M. Abazov et al. "Precision Measurement of the Ratio B(t→Wb)/B(t→Wq) and Extraction of Vtb." Phys. Rev. Lett. 107, 121802 – Published 15 September 2011. http://dx.doi.org/10.1103/PhysRevLett.107.121802.