Inspired by the chromo-natural inflation model of Adshead&Wyman, we reshape its scalar
content to relax the tension with current observational bounds. Besides an inflaton, the setup …

We consider a model in which a pseudo-scalar field σ rolls for some e-folds during inflation,
sourcing one helicity of a gauge field. These fields are only gravitationally coupled to the …

The motion of a pseudo-scalar field X during inflation naturally induces a significant
amplification of the gauge fields to which it is coupled. The amplified gauge fields can …

We study how Abelian-gauge-field production during inflation affects scalar perturbations in
the case when the gauge field interacts with the inflaton directly (by means of generic kinetic …

In string theory inspired models of axion-like fields, sub-leading non-perturbative effects, if
sufficiently large, can introduce steep cliffs and gentle plateaus onto the underlying scalar …

We study the possibility of using the LiteBIRD satellite B-mode survey to constrain models of
inflation producing specific features in CMB angular power spectra. We explore a particular …

We present new constraints on spectator axion-U (1) gauge field interactions during inflation
using the latest Planck (PR4) and BICEP/Keck 2018 data releases. This model can source …

We study constant-roll inflation in the presence of a gauge field coupled to an inflaton. By
imposing the constant anisotropy condition, we find new exact anisotropic constant-roll …

We study inflation driven by a dilaton and an axion, both of which are coupled to a SU (2)
gauge field. We find that the inflation driven by the dilaton occurs in the early stage of …

We study the possibility of using the $ LiteBIRD $ satellite $ B $-mode survey to constrain
models of inflation producing specific features in CMB angular power spectra. We explore a …