247 citations · 2k across the 37 of their papers we have counts for
4 papers · 1 filter
Peaky Production of Light Dark Photon Dark Matter
Yuichiro Nakai, Ryo Namba, Ippei Obata
We explore a mechanism to produce a light dark photon dark matter through a coupling between the dark photon field and a spectator scalar field which plays no role in the inflation…
Universality of linear perturbations in SU()-natural inflation
Tomohiro Fujita, Kai Murai, Ryo Namba
We prove the universality of predictions for linear perturbations from the entire class of models of inflation driven by a pseudo-scalar field coupled to an SU() gauge boson, wh…
Light Dark Photon Dark Matter from Inflation
Yuichiro Nakai, Ryo Namba, Ziwei Wang
We discuss the possibility of producing a light dark photon dark matter through a coupling between the dark photon field and the inflaton. The dark photon with a large wavelength i…
Kinetic Equilibration after Preheating
Robert Brandenberger, Ryo Namba, Rudnei O. Ramos
We study thermal equilibration after preheating in inflationary cosmology, which is an important step towards a comprehensive understanding of cosmic thermal history. By noticing t…