At 95% confidence, fewer than 4.6% of 125 GeV Higgs bosons decay to a photon plus an invisible massless dark photon, based on 137 fb^-1 of CMS data.
Higgs Boson Decays into Light Gravitinos
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abstract
We study decays of the neutral and charged Higgs bosons of the minimal supersymmetric standard model into a very light gravitino and a neutralino or chargino. Present experimental constraints already imply that the lighter scalar Higgs boson can only have a very small branching ratio into this mode. However, if the gravitino mass is below $\sim 0.5$ eV, the heavier neutral and charged Higgs boson decays into a gravitino can be important or even dominant. We discuss the resulting signature for associate production of the heavy CP-even and the CP-odd states at future $e^+ e^-$ colliders, and comment on Higgs boson production at hadron colliders.
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Search for dark photons in decays of Higgs bosons produced in association with Z bosons in proton-proton collisions at $\sqrt{s} =$ 13 TeV
At 95% confidence, fewer than 4.6% of 125 GeV Higgs bosons decay to a photon plus an invisible massless dark photon, based on 137 fb^-1 of CMS data.