Z\rightarrow A^0 A^0ν\barν$ and $e^+e^-\rightarrow A^0 A^0 Z$ in Two Higgs Doublet Models

Howard E. Haber; Yosef Nir

doi:10.1016/0370-2693(93)90087-X

paper

Z\rightarrow A^0 A^0ν\barν $an d$ e^+e^-\rightarrow A^0 A^0 Z$ in Two Higgs Doublet Models

arXiv:hep-ph/9302228 · doi:10.1016/0370-2693(93)90087-X

Abstract

In LEP searches for the neutral CP-odd scalar $A^{0}$ of a multi-Higgs doublet model, experimenters have searched for $Z \to h^{0} A^{0}$ (where $h^{0}$ is the lightest CP-even scalar). No model-independent limit on the $A^{0}$ mass can be deduced from present data if $m_{h^{0}} > m_{Z}$ . In this paper, we compute the rates for $Z \to A^{0} A^{0} ν ν ˉ$ and $e^{+} e^{-} \to A^{0} A^{0} Z$ . Assuming that no light CP-even neutral scalars exist, the branching ratio for $Z \to A^{0} A^{0} ν ν ˉ$ is found to be less than $1.4 \times 1 0^{- 8}$ . At higher $e^{+} e^{-}$ center-of-mass energies, $σ (e^{+} e^{-} \to A^{0} A^{0} Z)$ peaks at $0.5$ ~fb. A comparison with other direct searches for the $A^{0}$ is briefly considered.

16 pages, PHYZZX format

References in corpus (1)

Higgs boson bounds in non-minimal supersymmetric standard models

Z\rightarrow A^0 A^0ν\barνande^+e^-\rightarrow A^0 A^0 Z$ in Two Higgs Doublet Models

Abstract

References in corpus (1)

Cited by in corpus (26)

Z\rightarrow A^0 A^0ν\barν $an d$ e^+e^-\rightarrow A^0 A^0 Z$ in Two Higgs Doublet Models