Distinctive Heavy Higgs Decays

For a heavy Higgs boson above the $t\bar t$ threshold we consider three decay modes that could compete with decay to $t\bar t$, even in the alignment limit of a 2-Higgs doublet model. The decays $H\to AZ$, $Z'Z'$ and $τ'τ'$ show that heavy Higgs decays can be an effective probe of new physics both within and beyond this model.

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