HL-LHC and ILC sensitivities in the hunt for heavy Higgs bosons Henning Bahl, Philip Bechtle, Sven Heinemeyer, Stefan Liebler, Tim Stefaniak and Georg Weiglein Eur. Phys. J. C, 80 10 (2020) 916 Published online: 06 October 2020 DOI: 10.1140/epjc/s10052-020-08472-z