Production of heavy Higgs bosons and decay into top quarks at the LHC

The authors investigate the production of additional heavy Higgs bosons and their decay into top-quark top-antiquark pairs at the Large Hadron Collider (LHC). Extending the calculations to next-to-leading order in the strong coupling of Quantum Chromodynamics (QCD), the authors estimate the possibility of detecting such heavy Higgs bosons at LHC operating at 13 TeV.