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- W2291423858 abstract "We present a measurement of the fraction f + of right-handed W bosons produced in top quark decays, based on a candidate sample of tt - events in the l+jets and dilepton decay channels corresponding to an integrated luminosity of 370pb -1 collected by the D∅ detector at the Fermilab Tevatron pp - Collider at √s=1.96TeV. We reconstruct the decay angle θ ∗ for each lepton. By comparing the cosθ ∗ distribution from the data with that for the expected background and signal for various values of f + (where we assume that the fraction of longitudinally-polarized W bosons has the standard model value of 0.70), we find f + =0.056±0.080(stat)±0.057(syst) (f + Ũ0.23 at 95% C.L.), consistent with the standard model prediction of f + =3.6x10 -4 ." @default.
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- W2291423858 date "2007-01-01" @default.
- W2291423858 modified "2023-09-26" @default.
- W2291423858 title "Measurement of the W boson helicity in top quark decays at DO" @default.
- W2291423858 hasPublicationYear "2007" @default.
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