Primordial black holes in Higgs- R 2 inflation as the whole of dark matter

Primordial black holes are produced in a minimal UV extension to the Higgs inflation with an included R 2 term. We show that for parameters consistent with Standard Model measurements and Planck observation results lead to M PBH ∊ (10 −16 , 10 −15 ) M ⊙ primordial black holes with significant abundance, which may consist the majority of dark matter.