Title
Measurement of the helicity of **W** bosons in top-quark decaysMeasurement of the helicity of **W** bosons in top-quark decays
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Lancaster, Pa,
Subject
Physics
Source (journal)
Physical review : D : particles and fields. - Lancaster, Pa, 1970 - 2003
Volume/pages
73(2006):11, p. 111103,1-111103,7
ISSN
0556-2821
ISI
000238698300003
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
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 p&#773; 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→&#8467;νb (where &#8467;=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.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/3ddaaa/7e72c465.pdf
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