Search for Heavy Higgs Bosons Decaying into Two Tau Leptons with the ATLAS Detector using pp Collisions at vs = 13 TeV

Abstract

A search for heavy neutral Higgs bosons is performed using the LHC Run 2 data, corresponding to an integrated luminosity of 139 fb-1 of proton-proton collisions at vs = 13 TeV recorded by the ATLAS detector. The heavy resonance is searched over the mass range 0.2-2.5 TeV in the t+t- decay with at least one t-lepton decaying into handronic final states. The data are in good agreement with the Standard Model predictions. The observed (expected) upper limits are 1.8 fb (3.8 fb) for gluon-gluon fusion and 1.1 fb (2.2 fb) for b-associated production at the neutral Higgs boson mass of 1 TeV. Results are also interpreted in terms of several Minimum Supersymmetry Standard Model scenarios.