By recasting ATLAS's Z to three dark photon analysis, the authors set the best limits to date on the exotic Higgs decay chain H to aa to VVVV to eight fermions, bounding the branching fraction to roughly 4e-5 to 1e-4.
Search for leptophobic Z' bosons decaying into four-lepton final states in proton-proton collisions at sqrt(s) = 8 TeV
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abstract
A search for heavy narrow resonances decaying into four-lepton final states from cascade decays of a Z' boson has been performed using proton-proton collision data at sqrt(s) = 8 TeV collected by the CMS experiment, corresponding to an integrated luminosity of 19.7 inverse femtobarns. No excess of events over the standard model background expectation is observed. Upper limits for a benchmark model on the product of cross section and branching fraction for the production of these heavy narrow resonances are presented. The limit excludes leptophobic Z' bosons with masses below 2.5 TeV within the benchmark model. This is the first result to constrain a leptophobic Z' resonance in the four-lepton channel.
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Limits on an Exotic Higgs Decay From a Recast ATLAS Four-Lepton Analysis
By recasting ATLAS's Z to three dark photon analysis, the authors set the best limits to date on the exotic Higgs decay chain H to aa to VVVV to eight fermions, bounding the branching fraction to roughly 4e-5 to 1e-4.