An Effective Theory for Higgs Inflation

The generation of large curvature perturbations associated with the production of primordial black holes is studied in the context of a Higgs inflaton. To enable this amplification, we consider an inflationary model in which the tree-level action for gravity and the Standard Model Higgs is modified by quantum corrections, described by a series of higher-dimension operators. Finally within a minimal EFT framework, we present two viable models in which the spectrum of curvature perturbations generated by the Higgs field is consistent with CMB observations and can lead to the formation of primordial black holes in the asteroid mass range, potentially accounting for the entirety of dark matter.