Higgs Portal to Inflation and Fermionic Dark Matter

Understand

We investigate an inflationary model involving a gauge singlet scalar and fermionic dark matter.

• The mixing between the singlet scalar and the Higgs boson provides a portal to dark matter.
• The inflaton could either be the Higgs boson or the singlet scalar, and slow roll inflation is realized via its non-minimal coupling to gravity.
• In this setup, the effective scalar potential is stabilized by the mixing between two scalars and coupling with dark matter.