A note on the rare decay of a Higgs boson into photons and a $Z$ boson

Details A note on the rare decay of a Higgs boson into photons and a $Z$ boson A note on the rare decay of a Higgs boson into photons and a $Z$ boson

2004-11-10

arxiv.org/abs/hep-ph/0411152v1

Phys.Rev. D71 (2005) 017304

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 5 figures, RevTeX

Scientific paper

10.1103/PhysRevD.71.017304

We have calculated the width of the rare decay $H\to\gamma\gamma Z$ at one-loop level in the standard model for Higgs boson masses in the range $115 {\rm GeV} \leq m_H \leq 160 {\rm GeV}$ . For this range of Higgs boson masses we find that $Z$ boson is predominantly longitudinally polarized, and the photons have the same helicity. A comparison of the decay width $\Gamma(H\to \gamma\gamma Z)$ to those of $H\to\gamma\gamma$ and $H\to\gamma Z$ shows that, for the Higgs boson mass of $m_H \sim 135 \rm{GeV}$, the ratios of the decay widths are $\Gamma(H\to\gamma\gamma Z) / \Gamma(H\to\gamma\gamma) \sim \Gamma(H\to\gamma\gamma Z) / \Gamma(H\to\gamma Z) \sim 10^{-5}-10^{-6}$.

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