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

CDF Collaboration, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, et al. (2007). Search for V+A Current in Top-Quark Decays in pp¯ Collisions at s√=1.96  TeV. PHYSICAL REVIEW LETTERS, 98(7), e1-e7 [10.1103/PhysRevLett.98.072001].

Search for V+A Current in Top-Quark Decays in pp¯ Collisions at s√=1.96  TeV

CASTRO, ANDREA;DENINNO, MARIA MADDALENA;MOGGI, NICCOLO';RIMONDI, FRANCO;ZUCCHELLI, STEFANO
2007

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
2007
CDF Collaboration, A. Abulencia, J. Adelman, T. Affolder, T. Akimoto, M. G. Albrow, et al. (2007). Search for V+A Current in Top-Quark Decays in pp¯ Collisions at s√=1.96  TeV. PHYSICAL REVIEW LETTERS, 98(7), e1-e7 [10.1103/PhysRevLett.98.072001].
CDF Collaboration; A. Abulencia; J. Adelman; T. Affolder; T. Akimoto; M. G. Albrow; D. Ambrose; S. Amerio; D. Amidei; A. Anastassov; K. Anikeev; A. An...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/44138
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