Theoretical developments on Quartic Gauge Boson Couplings at LEP
نویسنده
چکیده
The search for quartic anomalous gauge couplings (QAGC) at LEP requires appropriate predictions for the radiative processes e+e− → νν̄γγ, e+e− → qq̄γγ and e+e− → 4 fermions+γ. The current knowledge on dimension-six operators giving rise to QAGC is briefly reviewed, together with their implementation in event generators. The accuracy of calculations based on real approximations (used up to now for the LEP experimental analysis) is examined by comparing them with the available exact matrix element calculations.
منابع مشابه
Quartic Gauge Boson Couplings Results at Lep
The study of charged and neutral boson vertices has been performed in different production channels at the LEP experiments. Decay rates and kinematic properties of these events are exploited to set constraints on the corresponding gauge couplings.
متن کاملAnomalous triple and quartic gauge boson couplings
This article reviews some recent developments in the analysis of anomalous triple and quartic vector boson couplings that have been discussed at the UK Phenomenology Workshop on Collider Physics 1999 in Durham.
متن کاملAnomalous Couplings at Lep2
In its second phase, LEP has allowed to study four fermion processes never observed before. Results are presented on the charged triple gauge boson couplings (TGC) from the W-pair, Single W and Single γ production. The anomalous quartic gauge couplings (QGC) are constrained using production of W W γ, ν ¯ νγγ and Zγγ final states. Finally, limits on the neutral anomalous gauge couplings (NGC) us...
متن کاملSensitivity to Anomalous Quartic Gauge Couplings in Photon-photon Interactions at the Lhc
The exclusive two-photon production at the LHC of pairs of W and Z bosons provides a novel and unique testground for the electroweak gauge boson sector. In particular it offers, thanks to high γγ center-of-mass energies, large and direct sensitivity to the anomalous quartic gauge couplings otherwise very difficult to investigate at the LHC. An initial analysis has been performed assuming lepton...
متن کاملProbing Anomalous Gauge Boson Couplings at Lep 1
We bound anomalous gauge boson couplings using LEP data for the Z → f f partial widths. We use an effective field theory formalism to compute the one-loop corrections resulting from non-standard model three and four gauge boson vertices. We find that measurements at LEP constrain the three gauge boson couplings at a level comparable to that obtainable at LEPII.
متن کامل