activity
19942023
most citedGeneralized G-inflation: Inflation with the most general second-order field equations

1.2k citations · 13.2k across the 177 of their papers we have counts for

collaborators

177 papers

hep-ph2023★ 2 cited

Reheating process in the inflationary model with the baryogenesis scenario

Hyun Jeong, Kohei Kamada, Alexei A. Starobinsky +1

Post-inflationary evolution and (re)heating of the viable inflationary model, the one, is made more realistic by including the leptogenesis scenario into it. For this purpose…

hep-ph2023★ 8 cited

Baryogenesis from sphaleron decoupling

Muzi Hong, Kohei Kamada, Jun'ichi Yokoyama

The electroweak sphaleron process breaks the baryon number conservation within the realms of the Standard Model of particle physics (SM). Recently, it is pointed out that its decou…

hep-th2023★ 56 cited

Note on the bispectrum and one-loop corrections in single-field inflation with primordial black hole formation

Jason Kristiano, Jun'ichi Yokoyama

Primordial black holes can be formed from the collapse of large-amplitude perturbation on small scales in the early Universe. Such an enhanced spectrum can be realized by introduci…

astro-ph.CO2022★ 7 cited

New description of the scaling evolution of the cosmological magneto-hydrodynamic system

Fumio Uchida, Motoko Fujiwara, Kohei Kamada +1

We present a new description of cosmological evolution of the primordial magnetic field under the condition that it is non-helical and its energy density is larger than the kinetic…

hep-th2022★ 85 cited

Constraining Primordial Black Hole Formation from Single-Field Inflation

Jason Kristiano, Jun'ichi Yokoyama

The most widely studied formation mechanism of a primordial black hole is collapse of large-amplitude perturbation on small scales generated in single-field inflation. In this Lett…

hep-ph2022★ 6 cited

Generation of neutrino dark matter, baryon asymmetry, and radiation after quintessential inflation

Kohei Fujikura, Soichiro Hashiba, Jun'ichi Yokoyama

We construct a model explaining dark matter, baryon asymmetry and reheating in quintessential inflation model. Three generations of right-handed neutrinos having hierarchical masse…