50 citations · 291 across the 24 of their papers we have counts for
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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…
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…
Inflation and Supersymmetry Breaking in Higgs- Supergravity
Shuntaro Aoki, Hyun Min Lee, Adriana G. Menkara
We propose a new construction of the supergravity inflation as an UV completion of the Higgs- inflation. In the dual description of -supergravity, we show that there appe…
Disentangling mass spectra of multiple fields in cosmological collider
Shuntaro Aoki, Masahide Yamaguchi
We study effects of multiple scalar fields (scalar isocurvatons) with the Hubble scale masses on the inflationary bispectrum in the squeezed limit, particular paying attention to t…