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Title
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Measurement of the helicity of **W** bosons in top-quark decays
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Author
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Institution/Organisation
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CDF Collaboration
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Abstract
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| We measure the branching fraction of the top quark to longitudinally and right-handed polarized W bosons, F0 and F+, using approximately 200 pb-1 of p̅ p collisions collected by the CDF II detector. We analyze two quantities sensitive to the W helicity: the invariant mass of the charged lepton and the bottom-quark jet in the decay t→Wb→ℓνb (where ℓ=e or μ), and the transverse momentum of the charged lepton. Constrained fits yield F0=0.74-0.34+0.22, and F+<0.27 at the 95% confidence level. These measurements are consistent with the standard model predictions. |
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Language
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English
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Source (journal)
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Physical review : D : particles, fields, gravitation, and cosmology / American Physical Society. - Ridge, N.Y., 2004 - 2015
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
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Publication
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Ridge, N.Y.
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American Physical Society
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2006
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ISSN
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1550-7998
[print]
1550-2368
[online]
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DOI
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10.1103/PHYSREVD.73.111103
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Volume/pages
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73
:11
(2006)
, p. 111103,1-111103,7
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ISI
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000238698300003
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Full text (Publisher's DOI)
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Full text (open access)
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