Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1997-01-21
Eur.Phys.J.C1:163-175,1998
Physics
High Energy Physics
High Energy Physics - Phenomenology
18 pages LaTex + 7 figures (ps)
Scientific paper
We analyze the coupling of CP-even and CP-odd Higgs bosons to a photon and a Z boson in extensions of the Standard Model. In particular, we study in detail the effect of charged Higgs bosons in two-Higgs doublet models, and the contribution of SUSY particle loops in the minimal supersymmetric extension of the Standard Model. The Higgs-$\gamma Z$ coupling can be measured in the decay $Z \to \gamma$+Higgs at $e^+e^-$ colliders running on the Z resonance, or in the reverse process Higgs $\to Z \gamma$ with the Higgs boson produced at LHC. We show that a measurement of this coupling with a precision at the percent level, which could be the case at future $e^+e^-$ colliders, would allow to distinguish between the lightest SUSY and standard Higgs bosons in large areas of the parameter space.
Djouadi Abdelhak
Driesen Volker
Hollik Wolfgang
Kraft Arnd
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