3 papers
astro-ph.CO2025
Stochastic-tail of the curvature perturbation in hybrid inflation
Tomoaki Murata, Yuichiro Tada
The exponential-tail behaviours of the probability density function (PDF) of the primordial curvature perturbation are confirmed in the mild-waterfall variants of hybrid inflation…
astro-ph.CO2025
Dip and non-linearity in the curvature perturbation from inflation with a transient non-slow-roll stage
Tomohiro Fujita, Ryodai Kawaguchi, Misao Sasaki +1
We consider models of inflation that contain a transient non-slow-roll stage and investigate the conditions under which a dip appears in the power spectrum of the curvature perturb…
hep-th2024
Towards a classification of UV completable Higgs inflation in metric-affine gravity
Yusuke Mikura, Yuichiro Tada
Towards a classification of UV completable Higgs inflation in the framework of parity-even metric-affine gravity, we investigate the particle spectrum of a deformed theory in the l…