Higgs decays to $\gamma$ and invisible particles in the standard model

Abstract

Using the Higgs boson mass $m_h=125$ GeV, the radiative Higgs decays $h\to \gamma {\nu }_l{\bar{\nu }}_l$ with ${\nu }_l={\nu }_e,{\nu }_{\mu }$ and ${\nu }_{\tau }$ are analyzed in the standard model. Our calculation shows that the inclusive width of these processes, i.e., the sum of $\Gamma (h\to \gamma {\nu }_l{\bar{\nu }}_l)$ for ${\nu }_l={\nu }_e,{\nu }_{\mu },{\nu }_{\tau }$, is $1.41$ keV, which is about $15\%$ of $\Gamma (h\to \gamma \gamma )$. 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.

Comments: 7 pages, 3 figures