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dc.contributor.authorBaringer, Philip S.
dc.contributor.authorBean, Alice
dc.contributor.authorCoppage, Don
dc.contributor.authorGardner, J.
dc.contributor.authorHensel, Carsten
dc.contributor.authorMoulik, Tania
dc.contributor.authorWilson, Graham Wallace
dc.identifier.citationV. M. Abazov et al. (D0 Collaboration). (2007). "Measurement of the W boson helicity in top quark decays at D0." Physical Review D, 75(3):031102.
dc.descriptionThis is the publisher's version, also available electronically from
dc.description.abstractWe present a measurement of the fraction f(+) of right-handed W bosons produced in top quark decays, based on a candidate sample of tt-bar events in the ℓ+jets and dilepton decay channels corresponding to an integrated luminosity of 370  pb(−1) collected by the D0 detector at the Fermilab Tevatron pp-bar Collider at s√=1.96  TeV. 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(+)<0.23 at 95% C.L.), consistent with the standard model prediction of f(+)=3.6×10(−4).
dc.publisherAmerican Physical Society
dc.titleMeasurement of the W boson helicity in top quark decays at D0
kusw.kuauthorBaringer, Philip S.
kusw.kuauthorBean, Alice
kusw.kuauthorCoppage, Don
kusw.kuauthorGardner, J.
kusw.kuauthorHensel, Carsten
kusw.kuauthorMoulik, Tania
kusw.kuauthorWilson, Graham Wallace
kusw.kudepartmentPhysics and Astronomy
kusw.oaversionScholarly/refereed, publisher version
kusw.oapolicyThis item does not meet KU Open Access policy criteria.

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