Measurement of Ɓ(t→Wb)/ Ɓ(t→Wb) at the Collider Detector at Fermilab

Authors

Darin Acosta, University of Florida, GainesvilleFollow
Kenneth A. Bloom, University of Nebraska-LincolnFollow
Collider Detector at Fermilab Collaboration

Date of this Version

9-2-2005

Comments

Published by American Physical Society. Copyright © 2005 American Physical Society. Permission to use. Phys. Rev. Lett. 95, 102002 (2005). http://prl.aps.org.

Abstract

We present a measurement of the ratio of top-quark branching fractions R=Ɓ (t→Wb)/ Ɓ(t→Wq), where q can be a b, s, or a d quark, using lepton-plus-jets and dilepton data sets with an integrated luminosity of ~162 pb^-1 collected with the Collider Detector at Fermilab during Run II of the Tevatron. The measurement is derived from the relative numbers of t t̅ events with different multiplicity of identified secondary vertices. We set a lower limit of R>0.61 at 95% confidence level.