The determination of theW anomalous magnetic moment in $$p\bar p \to W\gamma X$$

Stroughair, J. D.; Bilchak, C. L.

doi:10.1007/bf01452568

Cited by 24 publications

(20 citation statements)

References 20 publications

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“…Without requiring b-tagging to begin with, we can identify the jet which goes with the W as follows: the pair of jets which best reconstructs the top mass is assumed to come from the t → cg decay, and the other jet is then identified as the b-quark jet. Although the transverse momentum of the neutrino can be taken as the missing p T , there is a two-fold ambiguity in determining the neutrino momentum along the beam direction [17]. We choose the solution which best reconstructs the top mass using the momenta of the jet previously identified as the b jet, the charged lepton, and the neutrino.…”

Section: Top Quark Decay To Charm-gluon At the Tevatronmentioning

confidence: 99%

Searching for t → cg at the Fermilab Tevatron

et al. 1996

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We examine the experimental observability of the decay mode t → cg at the Fermilab Tevatron via the flavor-changing neutral current vertex tcg. We find that with the existing data, one should be able to probe the tcg coupling to a value smaller than indirect limits previously obtained from b → sγ and the measured branching fraction for t → bW , reaching BF (t → cg) ∼ 15% -28%. A data sample of 1 fb −1 (10 fb −1 ) at √ s = 2 TeV may probe the t → cg branching fraction to a level of 2% (0.5%).

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Section: Top Quark Decay To Charm-gluon At the Tevatronmentioning

confidence: 99%

Searching for t → cg at the Fermilab Tevatron

et al. 1996

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“…If the transverse moment u m of the neutrino is identified with the missing transverse momentum of a given W y event, the unobserved longitudinal neutrino momentum p L ( u ) can be reconstructed, albeit with a twofold ambiguity, by imposing the constraint that the neutrino and the charged lepton four-momenta combine t o form the W rest mass [5,45]. Neglecting the electron mass one finds where pL(e) denotes the longitudinal momentum of the electron.…”

Section: Inclusive Nlo Cross Sectionsmentioning

confidence: 99%

QCD corrections to hadronicWγproduction with nonstandardWWγcouplings

1993

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The process p(G + W* -y + x + livy t-x is calculated to O ( a , ) for general CP-conserving WWy couplings. At the Fermilab Tevatron center-of-mass energy, the QCD corrections to Wy production are modest, and the Born and incllisive O(a,) cross sections have similar sensitivities to the effects of anomalous couplings. At supercollider energies, the inclusive QCD corrections are large at high photon transverse momenta, reducing the sensitivity to nonstandard WWy couplings by up to a factor 2. The size of the QCD corrections can be reduced significantly, and a large fraction of the sensitivity lost can be regained, if a jet veto is imposed. PACS nunlber(s): 13.85.Qk, 12.38.I3x, 14.80.Er

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“…However, at hadron colliders the W Z invariant mass cannot be determined unambiguously because the neutrino from the W decay is not observed. If the transverse momentum of the neutrino is identified with the missing transverse momentum of a given W Z event, the unobserved longitudinal neutrino momentum p L (ν) can be reconstructed, albeit with a twofold ambiguity, by imposing the constraint that the neutrino and the charged lepton four-momenta combine to form the W rest mass [46,47]. Neglecting the lepton mass one finds…”

Section: Inclusive Nlo Cross Sectionsmentioning

confidence: 99%

WZproduction at hadron colliders: Effects of nonstandardWWZcouplings and QCD corrections

1995

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The process p p (−) → W ± Z + X → ℓ ± 1 ν 1 ℓ + 2 ℓ − 2 + X is calculated to O(α s ) for general C and P conserving W W Z couplings. At the Tevatron center of mass energy, the QCD corrections to W Z production are modest. At Large Hadron Collider (LHC) energies, the inclusive QCD corrections are large, but can be reduced significantly if a jet veto is imposed. Sensitivity limits for the anomalous W W Z couplings are derived from the next-to-leading order Z boson transverse momentum distribution for Tevatron and LHC energies. Unless a jet veto is imposed, next-to-leading order QCD corrections decrease the sensitivity to anomalous W W Z couplings considerably at LHC energies, but have little influence at the Tevatron. We also study, at next-to-leading order, rapidity correlations between the W and Z decay products, and the ZZ/W Z and W Z/W γ cross section ratios. These quantities are found to be useful tools in searching for the approximate zero present in the Standard Model W Z helicity amplitudes. The prospects for observing the approximate amplitude zero at the Tevatron and the LHC are critically assessed.

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The determination of theW anomalous magnetic moment in $$p\bar p \to W\gamma X$$

Cited by 24 publications

References 20 publications

Searching for t → cg at the Fermilab Tevatron

Searching for t → cg at the Fermilab Tevatron

QCD corrections to hadronicWγproduction with nonstandardWWγcouplings

WZproduction at hadron colliders: Effects of nonstandardWWZcouplings and QCD corrections

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