Corrections to oblique parameters induced by anomalous vector boson couplings
نویسنده
چکیده
We study quadratically divergent radiative corrections to the oblique parameters at CERN LEP1 induced by non-standard vector boson self-couplings. We work in the Stückelberg formalism and regulate the divergences through a gauge-invariant higher derivative scheme. Using consistency arguments together with the data we find a limit on the anomalous magnetic moment ∆κ of the W-boson, |∆κ| ∼< 0.26.
منابع مشابه
Corrections to oblique parameters induced by anomalous vector boson couplings
We study quadratically divergent radiative corrections to the oblique parameters at CERN LEP1 induced by non-standard vector boson self-couplings. We work in the Stückelberg formalism and regulate the divergences through a gauge-invariant higher derivative scheme. Using consistency arguments together with the data we find a limit on the anomalous magnetic moment ∆κ of the W-boson, |∆κ| ∼ < 0.26.
متن کاملQuartic Anomalous Couplings in eγ Colliders
We study the production of gauge boson pairs at the next generation of linear e+e− colliders operating in the eγ mode. The processes eγ → V V F (V, V ′ = W , Z, or γ and F = e or ν) can give valuable information on possible deviations of the quartic vector boson couplings from the Standard Model predictions. We establish the range of the new couplings that can be explored in these colliders bas...
متن کاملDetermination of New Electroweak Parameters at the ILC — Sensitivity to New Physics
We present a study of the sensitivity of an International Linear Collider (ILC) to electroweak parameters in the absence of a light Higgs boson. In particular, we consider those parameters that have been inaccessible at previous colliders, quartic gauge couplings. Within a generic effective-field theory context we analyze all processes that contain quasi-elastic weak-boson scattering, using com...
متن کاملDisguising the Oblique Parameters
We point out a set of operator identities that relate the operators corresponding to the oblique corrections to operators that modify fermion couplings to the gauge bosons as well as operators that modify triple gauge boson couplings. Such identities are simple consequences of the equations of motion. Therefore the contributions from new physics to the oblique parameters can be disguised as mod...
متن کاملElectroweak corrections and anomalous triple gauge-boson couplings in W+W− and W±Z production at the LHC
We have analysed the production of WZ and WW vector-boson pairs at the LHC. These processes give rise to four-fermion final states, and are particularly sensitive to possible non-standard trilinear gauge-boson couplings. We have studied the interplay between the influence of these anomalous couplings and the effect of the complete logarithmic electroweak O(α) corrections. Radiative corrections ...
متن کامل