Higgs boson decay into Z bosons and a photon

Abstract

We have performed a one-loop calculation of the width of the rare decay H -> Z Z γin the standard model for Higgs boson masses 190 GeV \leq m_H \leq 250 GeV. We find that the most dominant helicity combinations for the Z bosons and the photon is when one of the Z bosons is longitudinally polarized and the other Z boson and the photon have the same helicity. A comparison of the decay width Γ(H->Z Z γ) to those of H->γγand H->γZ shows that the ratios of the decay widths are Γ(H->Z Z γ) / Γ(H->γγ) ~ Γ(H->Z Z γ) / Γ(H->γZ) ~ 10^{-7}.

4 pages, 5 figures, RevTeX, figures corrected