Regular Article - Theoretical Physics
Scalaron–Higgs inflation reloaded: Higgs-dependent scalaron mass and primordial black hole dark matter
Dipartimento di Fisica, Università degli Studi di Trieste, Strada Costiera 11, 34151, Miramare-Trieste, Italy
2 Istituto Nazionale di Fisica Nucleare, Trieste Section, Via Valerio 2, 34127, Trieste, Italy
3 Physikalisches Institut, Albert-Ludwigs-Universität Freiburg, Hermann-Herder-Str. 3, 79104, Freiburg, Germany
Accepted: 9 May 2021
Published online: 26 May 2021
We propose an extension of the scalaron-Higgs model by a non-minimal coupling of the Standard Model Higgs boson to the quadratic Ricci scalar resulting in a Higgs-dependent scalaron mass. The model predicts a successful stage of effective single-field Starobinsky inflation. It features a multi-field amplification mechanism leading to a peak in the inflationary power spectrum at small wavelengths which enhances the production of primordial black holes. The extended scalaron-Higgs model unifies inflationary cosmology with elementary particle physics and explains the origin of cold dark matter in terms of primordial black holes without assuming any new particles.
© The Author(s) 2021
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