Speaker
Description
We present a study of Higgs boson decays involving a photon and leptonic or neutrino pairs within the Standard Model. For $H \to \ell^+ \ell^- \gamma$ with $\ell = e, \mu$, we calculate differential decay rates, branching fractions, and forward-backward asymmetries, providing analytic expressions for experimental analyses. Our approach distinguishes the resonant $H \to Z\gamma$ contribution from non-resonant contributions enabling precise extraction of $\Gamma(H \to Z\gamma)$. We propose optimized kinematic cuts to effectively separate these components, thereby enhancing the discovery potential for both $H \to Z\gamma$ and the tree-level $H \to \mu^+ \mu^- \gamma$ decay. Additionally, for $H \to \nu \bar{\nu} \gamma$, we present leading-order one-loop calculations, highlighting the role of non-resonant box diagrams.
