Higgs decays to $γ$ and invisible particles in the standard model

Using the Higgs boson mass $m_h=125$ GeV, the radiative Higgs decays $h\rightarrowγν_l\barν_l$ with $ν_l = ν_e,\,ν_μ$ and $ν_τ$ are analyzed in the standard model. Our calculation shows that the inclusive width of these processes, i.e., the sum of $Γ(h\toγν_l\barν_l)$ for ${ν_l=ν_e,ν_μ,ν_τ}$, is $1.41$ keV, which is about $15\%$ of $Γ(h\toγγ)$. Therefore, the observation of these channels in the future precise experiments may provide us some useful information on the Higgs physics both in the standard model and in its possible extensions.

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