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Search for V+A current in top-quark decays in pp collisions at sqrts=1.96 TeV.

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[over ] collisions at sqrts=1.96 TeV acquired by the upgraded Collider Detector at Fermilab. For the decay t-->Wb-->lnub (where l=e or micro), 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 9...

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Journal:
Physical Review Letters More from this journal
Volume:
98
Issue:
7
Pages:
072001
Publication date:
2007-02-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Keywords:
Pubs id:
pubs:117302
UUID:
uuid:ce905b18-51f5-400d-8209-9a74a634c363
Local pid:
pubs:117302
Source identifiers:
117302
Deposit date:
2012-12-19

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