50 citations · 291 across the 24 of their papers we have counts for
24 papers
Continuous Spectrum on Cosmological Collider
Shuntaro Aoki
We study the effects of a massive field with a continuous spectrum (continuum isocurvaton) on the inflationary bispectrum in the squeezed limit. As a concrete example, we extend th…
Pole inflation and primordial black holes formation in Starobinsky-like supergravity
Shuntaro Aoki, Ryotaro Ishikawa, Sergei V. Ketov
We extend the Cecotti-Kallosh model of Starobinsky inflation in supergravity by adding a holomorphic function to the superpotential in order to generate a large peak in the power s…
On the Weyl gravity extension of Higgs inflation
Shuntaro Aoki, Hyun Min Lee
We consider the embedding of Higgs inflation with a non-minimal coupling into the Weyl gravity. In this model, the effective current-current interactions from the heavy Weyl gauge…
Reheating and Dark Matter Freeze-in in the Higgs- Inflation Model
Shuntaro Aoki, Hyun Min Lee, Adriana G. Menkara +1
We study the post-inflationary dynamics for reheating and freeze-in dark matter in the Higgs- inflation model. Taking the perturbative approach for reheating, we determine the…
Inflationary flavor oscillations and the cosmic spectroscopy
Lucas Pinol, Shuntaro Aoki, Sébastien Renaux-Petel +1
Inflationary scenarios motivated by high-energy physics generically contain a plethora of degrees of freedom beyond the primordial curvature perturbation. The latter interacts in a…
Constrained Superfields in Dynamical Background
Shuntaro Aoki, Takahiro Terada
We study the nonlinear realization of supersymmetry in a dynamical/cosmological background in which derivative terms like kinetic terms are finite. Starting from linearly realized…