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Search for V plus A current in top-quark decays in p(p)over-bar collisions root s=1.96 TeV

Abulencia A.
•
Adelman J.
•
Affolder T.
altro
SCURI, Fabrizio
2007
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We report an upper limit on the fraction of V+A current, f(V+A), in top-quark decays, using approximately 700 pb(-1) of p (p) over bar collisions at root s=1.96 TeV acquired by the upgraded Collider Detector at Fermilab. For the decay t -> Wb ->center dot nu b (where center dot=e or mu), the invariant mass of the charged lepton and the bottom quark jet is sensitive to the polarization of the W boson. We determine f(V+A)=-0.06 +/- 0.25 given a top-quark mass of 175 GeV/c(2). We set an upper limit on f(V+A) of 0.29 at the 95% confidence level, an improvement by a factor of 2 on the previous best direct limit.
DOI
10.1103/PhysRevLett.98.072001
WOS
WOS:000244250300021
Archivio
http://hdl.handle.net/11390/877469
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-33847012672
Diritti
metadata only access
Scopus© citazioni
16
Data di acquisizione
Jun 2, 2022
Vedi dettagli
Web of Science© citazioni
18
Data di acquisizione
Mar 16, 2024
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