Open AccessD. acosta et al., the cdf collaboration,
Author(s) -
Top Physics
Publication year - 2005
Language(s) - English
Resource type - Reports
DOI - 10.2172/842937
Subject(s) - lepton , physics , particle physics , branching fraction , monte carlo method , bar (unit) , boson , sensitivity (control systems) , nuclear physics , statistics , mathematics , electron , electronic engineering , meteorology , engineering
We present a measurement of the ratio of top-quark branching fractions R = {Beta}(t {yields} Wb)/{Beta}(t {yields} Wq) using lepton-plus-jets and dilepton data sets with integrated luminosity of {approx}162 pb{sup -1} collected with the Collider Detector at Fermilab during Run II of the Tevatron. The measurement is derived from the relative numbers of t{bar t} events with different multiplicity of identified secondary vertices. We set a lower limit of R > 0.61 at 95% confidence level