Scalaron–Higgs inflation reloaded: Higgs-dependent scalaron mass and primordial black hole dark matter Anirudh Gundhi and Christian F. Steinwachs Eur. Phys. J. C, 81 5 (2021) 460 Published online: 26 May 2021 DOI: 10.1140/epjc/s10052-021-09225-2