851 citations · 5.2k across the 133 of their papers we have counts for
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Sneutrinos as Mixed Inflaton and Curvaton
Naoyuki Haba, Tomo Takahashi, Toshifumi Yamada
We investigate a scenario where the supersymmetric partners of two right-handed neutrinos (sneutrinos) work as mixed inflaton and curvaton, motivated by the fact that the curvaton…
Refined Study of Isocurvature Fluctuations in the Curvaton Scenario
Naoya Kitajima, David Langlois, Tomo Takahashi +1
We revisit the generation of dark matter isocurvature perturbations in the curvaton model in greater detail, both analytically and numerically. As concrete examples, we investigate…
CMB spectral distortions in generic two-field models
Kimmo Kainulainen, Juuso Leskinen, Sami Nurmi +1
We investigate the CMB distortion in models where two uncorrelated sources contribute to primordial perturbations. We parameterise each source by an amplitude, tilt, running an…
A new bound on the low reheating temperature with dark matter
Ki-Young Choi, Tomo Takahashi
We investigate a new bound on the low reheating temperature in a scenario where the Universe experiences early matter-domination before reheating after which the standard big bang…
Dark matter kinetic decoupling with a light particle
Ayuki Kamada, Tomo Takahashi
We argue that the acoustic damping of the matter power spectrum is not a generic feature of the kinetic decoupling of dark matter, but even the enhancement can be realized dependin…