The coherent oscillation of axionic fields naturally drives copious production of dark photon
particles in the early Universe, due to resonance and tachyonic enhancement. During the …

Although natural inflation is a theoretically well-motivated model for cosmic inflation, it is in
tension with recent Planck cosmic microwave background anisotropy measurements. We …

We study models of inflation where the scalar field ϕ that drives inflation is coupled non-
minimally to gravity via ξ ϕ 2 R, or where the gravity sector is enlarged by an R 2 term. We …

We prove the universality of predictions for linear perturbations from the entire class of
models of inflation driven by a pseudoscalar field coupled to an SU (N) gauge boson, where …

A bstract We apply the multiple point criticality principle to inflationary model building and
study Coleman-Weinberg inflation when the scalar potential is quadratic in the logarithmic …

A bstract We consider a model of quartic inflation where the inflaton is coupled non-
minimally to gravity and the self-induced radiative corrections to its effective potential are …

We consider an UV-protected Natural Inflation scenario involving Chern-Simons-like
interactions between the inflaton and some beyond the Standard Model gauge fields. The …

In this paper we consider a model based on interacting p-forms and explore some
cosmological applications. Restricting to gauge invariant actions, we build a general …

A bstract We use conformal symmetry to constrain the shape of inflationary correlators in the
presence of long-lived vector field perturbations. Applying conformal Ward identities, we …