Trilinear Gauge Boson Couplings in the MSSM

Abstract

We study the C and P even WWγand WWZ trilinear gauge boson vertices (TGV's), in the context of the MSSM assuming that the external W's are on their mass shell. We find that for energies less than 200 GeV squark and slepton contributions to the aforementioned couplings are two orders of magnitude smaller than those of the Standard Model (SM). In the same energy range the bulk of the supersymmetric Higgs corrections to the TGV's is due to the lightest neutral Higgs, h_0, whose contribution is like that of a Standard Model Higgs of the same mass. The contributions of the Neutralinos and Charginos are sensitive to the input value for the soft gaugino mass M_{1/2}, being more pronounced for values M_{1/2} < 100 GeV. In this case and in the unphysical region, 0 < \sqrt{s} < 2 M_W , their contributions are substantially enhanced resulting in large corrections to the static quantities of the W boson. However, such an enhancement is not observed in the physical region. In general for 2 M_W < \sqrt{s} < 200 GeV the MSSM predictions differ from those of the SM but they are of the same order of magnitude. To be detectable deviations from the SM require sensitivities reaching the per mille level and hence unlikely to be observed at LEP200. For higher energies SM and MSSM predictions exhibit a fast fall off behaviour, in accord with unitarity requirements, getting smaller,in most cases, by almost an order of magnitude already at energies \sqrt{s} 0.5 TeV.

16 pages, latex

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Cited by in corpus (15)

• Study of Trilinear Gauge Boson Couplings at the Tevatron Collider
• New and Standard Physics contributions to anomalous Z and gamma self-couplings
• SU_L(2) X U_Y(1)-invariant description of the bilepton contribution to the WWV vertex in the minimal 331 model
• Unravelling the anomalous gauge boson couplings in $Z{W}^{\pm }$ production at the LHC and the role of spin-$1$ polarizations
• Static quantities of a neutral bilepton in the 331 model with right-handed neutrinos
• One-loop effects of extra dimensions on the WWγand WWZ vertices
• Non-Decoupling Effects of Higgs Bosons on $e^{+}{e}^{-}\to W_L^{+}{W}_L^{-}$ in the Two-Doublet Model
• Static quantities of the W boson in the SU_L(3) X U_X(1) model with right-handed neutrinos
• One-loop sfermion corrections to $e^{-}{e}^{+}\to W^{-}{W}^{+}$ in the MSSM
• Trilinear gauge boson couplings in the standard model with one universal extra dimension
• $H^{+}{W}^{-}Z$ contribution to the static quantities of the W boson in the context of Higgs-triplet theories
• Fermion contribution to the static quantities of arbitrarily charged vector bosons
• New Physics Contribution to Neutral Trilinear Gauge Boson Couplings
• $WWV$ $(V=\gamma ,Z)$ vertex in the Georgi-Machacek model
• A set of sum rules for anomalous gauge boson couplings