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Such a scalar can be associated with a light remnant of the Higgs mechanism in the \"dark\" sector. We suggest $\\phi\\to l^+l^-$ bump hunting in $\\mu\\to e\\nu\\bar\\nu\\phi$, $\\mu^-p\\to\\nu_\\mu n\\phi$ (muon capture), and $K^\\pm\\to \\mu^\\pm\\nu\\phi$ decays as direct probes of this scenario. 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