Searching for Neutral BSM Higgs and Gauge Bosons in the $\tau\tau$ Decay Channel Using 2015+2016 Data from the ATLAS Detector

A search for neutral MSSM Higgs bosons and Z' bosons is performed using 36 fb$^{-1}$ of data from $\sqrt{s}$ = 13 TeV proton–proton collisions recorded by the ATLAS detector in 2015 and 2016. The heavy resonance is assumed to decay to $\tau^+\tau^-$ with at least one tau lepton decaying to final states with hadrons and a neutrino. Results are interpreted in the hMSSM, $m_h^{mod+}$, sequential SM, and non-universal G(221) model benchmark scenarios.