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Measurement of beta (t -> Wb)/beta(t -> Wq) at root s=1.96 TeV
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2006 (English)In: Physics Letters B, ISSN 0370-2693, E-ISSN 1873-2445, Vol. 639, no 6, 616-622 p.Article in journal (Refereed) Published
Abstract [en]

We present the measurement of R = B(t -> Wb)/B(t -> Wq) in pp collisions at root s = 1.96 TeV, using 230 pb(-1) of data collected by the DO experiment at the Fermilab Tevatron Collider. We fit simultaneously R and the number (N-tt) of selected top quark pairs (tt), to the number of identified b-quark jets in events with one electron or one muon, three or more jets, and high transverse energy imbalance. To improve sensitivity, kinematical properties of events with no identified b-quark jets are included in the fit. We measure R = 1.03(-0.17)(0.19) (stat + syst), in good agreement with the standard model. We set lower limits of R > 0.61 and vertical bar V-tb vertical bar > 0.78 at 95% confidence level.

Place, publisher, year, edition, pages
2006. Vol. 639, no 6, 616-622 p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:uu:diva-155437DOI: 10.1016/j.physletb.2006.07.019ISI: 000239858600006OAI: oai:DiVA.org:uu-155437DiVA: diva2:426040
Available from: 2011-06-22 Created: 2011-06-22 Last updated: 2017-12-11Bibliographically approved

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