CDF Collaboration
Published 2012-11-19, updated 2013-01-29Version 2
We measure the polarization of W bosons from top-quark (t) decays into final states with a charged lepton and jets, tt --> WbWb --> lvbqqb, using the full Run II data set collected by the CDF II detector. A model-independent method simultaneously determines the fraction of longitudinal (f_0) and right-handed (f_+) W bosons to yield f_0 = 0.726 +/- 0.066 (stat) +/- 0.067 (syst) and f_+ = -0.045 +/- 0.044 (stat) +/- 0.058 (syst) with a correlation coefficient of -0.69. Additional results are presented under various standard model assumptions. No significant discrepencies with the standard model are observed.
Comments: 8 pages, 2 figures; as accepted to Phys. Rev. D Rapid Communications
Journal: Phys.Rev. D 87, 03110(R) (2013)
Measurement of R = \boldmath${\mathcal{B}(t \rightarrow Wb)/\mathcal{B}(t \rightarrow Wq)} $ in Top--quark--pair Decays using Lepton+jets Events and the Full CDF Run II Data set
Measurement of the top-quark mass in the ${t\bar{t}}$ dilepton channel using the full CDF Run II data set
Measurement of \boldmath $R = {\mathcal{B}\left(t \rightarrow Wb \right)/\mathcal{B}\left(t \rightarrow Wq \right)} $ in Top--Quark--Pair Decays using Dilepton Events and the Full CDF Run II Data Set
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