167 citations · 1.5k across the 73 of their papers we have counts for
6 papers · 1 filter
Effects of Radiative Corrections on Starobinsky Inflation
John Ellis, Tony Gherghetta, Kunio Kaneta +2
We analyze radiative corrections to the Starobinsky model of inflation arising from self-interactions of the inflaton, and from its Yukawa couplings, , to matter fermions, and d…
Post-Reheating Inflaton Production as a Probe of Reheating Dynamics
Kunio Kaneta, Tomo Takahashi, Natsumi Watanabe
Cosmological reheating bridges the inflationary epoch and the hot big bang phase, yet its underlying dynamics remain poorly understood. In this work, we investigate a minimal scena…
Gravitational waves from supermassive right-handed neutrinos produced at preheating
Shinya Kanemura, Kunio Kaneta, Dibyendu Nanda
The post-inflationary production of supermassive particles can have profound implications for the thermal history of the universe and may leave observable imprints in the gravitati…
Observational tests for a class of scalar-tensor gravity
Kunio Kaneta, Kin-ya Oda, Motohiko Yoshimura
We study observational bounds in a class of scalar-tensor gravity theories recently proposed. Either an upper or lower bound on a conformal factor in these theories is derived from…
Dark energy under a gauge symmetry: A review of gauged quintessence and its implications
Kunio Kaneta, Hye-Sung Lee, Jiheon Lee +1
We review the gauged quintessence scenario, wherein the quintessence scalar field responsible for dark energy is promoted to a complex field charged under a dark gauge symme…
A common origin of two accelerating universes: inflation and dark energy
Kunio Kaneta, Kin-ya Oda, Motohiko Yoshimura
We develop a quantum theory of inflaton and its decay product of various gauge boson pairs to investigate the preheating towards thermalized universe. The inflaton decay into gauge…