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Precision Measurement of the Ratio ${\cal B}(t\to Wb)/{\cal B}(t\to Wq)$ and Extraction of $V_{tb}$
Stockholm University, Faculty of Science, Department of Physics.
2011 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 107, no 12, 121802- p.Article in journal (Refereed) Published
Abstract [en]

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 t (t) over bar final states. The measurement uses data from 5: 4 fb(-1) of p (p) over bar 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 vertical bar V(tb)vertical bar as vertical bar V(tb)vertical bar = 0.95 +/- 0.02, assuming unitarity of the 3 x 3 CKM matrix.

Place, publisher, year, edition, pages
2011. Vol. 107, no 12, 121802- p.
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-63104DOI: 10.1103/PhysRevLett.107.121802ISI: 000294929600001OAI: diva2:446695
Swedish Research Council
Publikationen har totalt 420 författare, V. Abazov et al.Available from: 2011-10-09 Created: 2011-10-09 Last updated: 2012-01-26Bibliographically approved

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