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We have recently proposed the idea that dark matter in our universe is formedby primordial black holes generated by Standard Model Higgs fluctuations duringinflation and thanks to the fact that the Standard Model Higgs potentialdevelops an instability at a scale of the order of $10^{11}$ GeV. In thissense, dark matter does not need any physics beyond the Standard Model,although the mechanism needs fine-tuning to avoid the overshooting of the Higgsinto the dangerous AdS vacuum. We show how such fine-tuning can be naturallyavoided by coupling the Higgs to a very heavy scalar with mass $\gg 10^{11}$GeV that stabilises the potential in the deep ultraviolet, but preserving thebasic feature of the mechanism which is built within the Standard Model.

Primordial Black Holes from Higgs Vacuum Instability: Avoiding Fine-tuning through an Ultraviolet Safe Mechanism