Measurement of W-Boson Helicity Fractions in Top-Quark Decays Using costheta*

Details Measurement of W-Boson Helicity Fractions in Top-Quark Decays Using costheta* Measurement of W-Boson Helicity Fractions in Top-Quark Decays Using costheta*

2008-11-03

arxiv.org/abs/0811.0344v3

Phys.Lett.B674:160-167,2009

Physics

High Energy Physics

High Energy Physics - Experiment

17 pages, 3 figures. Submitted to PLB. This is the revised version as accepted by PLB

Scientific paper

10.1016/j.physletb.2009.02.040

Fully reconstructed top-antitop-events are used to determine the fractions of right-handed and longitudinally polarized W bosons produced in top-quark decays. The helicity fractions are sensitive to the couplings and the Dirac structure of the Wtb vertex. This paper reports measurements of the W-boson helicity fractions from two different methods using data corresponding to an integrated luminosity of 1.9 fb-1 of proton-antiproton collisions collected by the CDF II detector operating at the Fermilab Tevatron.

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