Title
Search for V+A current in top-quark decays in <tex>$p\overline{p}$</tex> collisions at <tex>$\sqrt{s}$</tex>=1.96 TeV
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Source (journal)
Physical review letters. - New York, N.Y.
Volume/pages
98(2007) :7 , p. 072001,1-072001,7
ISSN
0031-9007
ISI
000244250300021
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We report an upper limit on the fraction of V+A current, fV+A, in top-quark decays, using approximately 700  pb-1 of pp&#773; collisions at √s=1.96   TeV acquired by the upgraded Collider Detector at Fermilab. For the decay t→Wb→&#8467;νb (where &#8467;=e or μ), the invariant mass of the charged lepton and the bottom quark jet is sensitive to the polarization of the W boson. We determine fV+A=-0.06±0.25 given a top-quark mass of 175  GeV/c2. We set an upper limit on fV+A of 0.29 at the 95% confidence level, an improvement by a factor of 2 on the previous best direct limit.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/687a92/212e701d.pdf
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