Combination of CDF and D0 measurements of the W boson helicity in top quark decays

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Abstract

I report on the combination of measurements from CDF and D0 of the helicity fractions of W bosons from top quark decays. The result, when both the longitudinal (f0) and right-handed (f+) fractions are allowed to float, is f0 = 0.722 ± 0.081 [± 0.062 (stat.) ± 0.052 (syst.)] and f+ = -0.033 ± 0.046 [± 0.034 (stat.) ± 0.031 (syst.)], consistent with the Standard Model (SM) expectation. When one fraction is fixed to its SM value the results for the other fraction are f0 = 0.682 ± 0.057 [± 0.035 (stat.) ± 0.046 (syst.)] and f+ = -0.015 ± 0.035 [± 0.018 (stat.) ± 0.030 (syst.)].

Original languageEnglish (US)
JournalProceedings of Science
Volume2012-July
StatePublished - Jan 1 2012
Event36th International Conference on High Energy Physics, ICHEP 2012 - Melbourne, Australia
Duration: Jul 4 2012Jul 11 2012

ASJC Scopus subject areas

  • General

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