Speaker
Antonio Racioppi
(National Institute of Chemical Physics and Biophysics (EE))
Description
We study symmetry-breaking inflation within the framework of metric-affine gravity. By introducing a non-minimal coupling, $\beta(\phi)\tilde{\cal R}$, between the Holst invariant and the inflaton, both small-field and large-field inflationary predictions can be brought into agreement with the latest observational constraints. Remarkably, even for sub-Planckian vacuum expectation values, appropriately chosen values of $\beta(\phi)$ enable viable inflation, a scenario previously considered unattainable.
Authors
Antonio Racioppi
(National Institute of Chemical Physics and Biophysics (EE))
Ioannis Gialamas
(National Institute of Chemical Physics and Biophysics)
