arXiv subjects
Publications and source records attributed to M. Ratzlaff.
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.
New heavy leptons with standard model gauge couplings have well determined cross sections for pair production. A standard pattern of mass mixing implies that the most likely decays are $τ^\prime\to W ν'$ and $ ν'\to W τ$. Interestingly there have been no direct searches for heavy leptons with these decays at the LHC. However comparison with several multi-lepton searches allow us to set new limits on the heavy lepton masses. Three observed excesses in the signal regions prevent us from setting stronger limits.