2.4k citations · 12k across the 222 of their papers we have counts for
9 papers · 1 filter
Pendulum Leptogenesis
Kazuharu Bamba, Neil D. Barrie, Akio Sugamoto +2
We propose a new non-thermal Leptogenesis mechanism that takes place during the reheating epoch, and utilizes the Ratchet mechanism. The interplay between the oscillation of the in…
Ratchet Baryogenesis with an Analogy to the Forced Pendulum
Kazuharu Bamba, Neil D. Barrie, Akio Sugamoto +2
A new scenario of baryogenesis via the ratchet mechanism is proposed based on an analogy to the forced pendulum. The oscillation of the inflaton field during the reheating epoch af…
Is it possible to unify three kinds of Dark Matters into a Kaluza-Klein Neutrino?
Sakiko G. J. Nishio, Kazuharu Bamba, Akio Sugamoto
A unified theory of including all kinds of dark matters into a single species (field) is discussed. In particular, it is considered that the Warm Dark matter (WDM), the existence o…
Cosmological birefringence due to CPT-even Chern-Simons-like term with Kalb-Ramond and scalar fields
Shih-Hao Ho, W. F. Kao, Kazuharu Bamba +1
We study the CPT-even dimension-six Chern-Simons-like term by including dynamical Kalb-Ramond and scalar fields to examine the cosmological birefringence. We show that the combined…
Radiative neutrino mass generation and dark energy
K. Bamba, C. Q. Geng, S. H. Ho
We study the models with radiative neutrino mass generation and explore the relation between the neutrino masses and dark energy. In these models, the pseudo-Nambu-Goldston bosons…
Hypermagnetic Baryogenesis
Kazuharu Bamba, C. Q. Geng, S. H. Ho
We study a new scenario for baryogenesis due to the spontaneous breaking of the invariance through the interaction between a baryon current and a hypermagnetic helicity. The…