Effects of non-standard tri-linear couplings in photon-photon collisions (I) γγ → W+Wt-

@article{Baillargeon1997EffectsON,
  title={Effects of non-standard tri-linear couplings in photon-photon collisions (I) $\gamma$$\gamma$ → W+Wt-},
  author={Marc Baillargeon and Genevieve B'elanger and F. Boudjema},
  journal={Nuclear Physics},
  year={1997},
  volume={500},
  pages={224-254}
}
Abstract The effect of anomalous couplings in γγ → W + W t - is studied for different energies of the γγ mode of the next linear collider. The analysis based on the maximum likelihood method exploits the variables in the four-fermion semi-leptonic final state. Polarized differential cross sections based on the complete set of diagrams for these channels with the inclusion of anomalous couplings are used and compared to an approximation based on γγ → W + W t - with full spin correlations. To… Expand
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References

SHOWING 1-10 OF 85 REFERENCES
Trilinear couplings among the electroweak vector bosons and their determination at LEP2
Abstract We present a detailed investigation of the potential of LEP2 to measure the (trilinear) couplings of the vector bosons, Z 0 W + W − and γW + W − among one another. The restrictions imposedExpand
Semi-leptonic four-fermion final states in polarised γγ reactions: Exact results vs. an improved narrow width approximation
Abstract We calculate the process γγ → e − ν ud with the full set of Feynman diagrams. We consider different implementations of the W width and different combinations of the photon polarisations. TheExpand
Study of anomalous couplings at a 500 GeV e+e- linear collider with polarized beams.
TLDR
A sensitivity to the anomalous couplings that is 2 orders of magnitude higher than that achievable at CERN LEP II is found. Expand
Electroweak 0 (α) corrections to W+W− pair production in polarized γγ collisions
Full 0 (α) electroweak corrections for γγ → W+W− are calculated including virtual corrections, soft and hard real photon and Z-boson emission. The corrections are quite large ranging from −2.5% atExpand
Probing the weak boson sector in e + e - →W + W -
A detailed analysis of W pair production in e+e− annihilation at LEP-II energies is presented by using helicity amplitudes for the process e+e−→W+W− with arbitrary WWγ and WWZ couplings. ExpressingExpand
The fermion-loop scheme for finite-width effects in e(+)e(-) annihilation into four fermions
Abstract We describe the gauge-invariant treatment of the finite-width effects of W and Z bosons in the fermion-loop scheme and its application to the six-fermion (LEP2) processes et-e+ → fourExpand
Chiral lagrangians and precision measurements of triple gauge boson vertices at hadron colliders
Abstract We explore the possibility of performing precision electroweak measurements at the SSC and LHC in the case that no new resonances appear below 1 TeV. In particular, we use a chiralExpand
???W+W- and ???ZZ as tests of novel quartic couplings
Abstract The lowest dimension anomalous quartic vector boson couplings are studied in boson pair production at a high-energy photon-photon collider. Since our couplings do not break the custodialExpand
Z boson pair production in high energy photon-photon collisions and the Higgs signal
Abstract The complete standard model calculation for the reaction γγ→ZZ has been done. The W boson loop contribution is found to be substantial. It leads to a large value of the transverselyExpand
Low-energy impact of a heavy Higgs boson sector
Abstract The effective theory which characterizes the low-energy sensitivity of the minimal Weinberg-Salam model to a heavy Higgs boson sector is shown to be the gauged SU(2) L × U(1) non-linear θExpand
...
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4
5
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