359 citations · 2.7k across the 60 of their papers we have counts for
32 papers · 1 filter
Photon evolution through light-particle conversion in stochastic magnetic fields: Kramers--Kronig relations and universality
Wataru Chiba, Ryusuke Jinno, Kimihiro Nomura
We study photon conversion into light particles, such as dilatons, axions, and gravitons, induced by background magnetic fields, and formulate the resulting evolution in terms of t…
Particle Production via Rippled Bubble Walls
Ryusuke Jinno, Shota Nakagawa, Yuichiro Nakai +1
We investigate non-thermal particle production during first-order phase transitions in the presence of ultra-relativistic thick bubble walls with non-trivial internal structure. Ex…
Axion-photon conversion in stochastic magnetic fields
Wataru Chiba, Ryusuke Jinno, Kimihiro Nomura
We investigate axion-photon conversion in stochastic magnetic fields, focusing on the evolution of the photon intensity and polarizations induced by conversion into axions. Assumin…
Acoustically driven dark matter freeze-out
Iason Baldes, Ryusuke Jinno
We extend the study of the effect of density perturbations to the well known thermal dark matter freeze-out scenario. We find enhancements in the cross section are…
Curvature Perturbations from First-Order Phase Transitions: Implications to Black Holes and Gravitational Waves
Gabriele Franciolini, Yann Gouttenoire, Ryusuke Jinno
Understanding whether primordial black holes form during strong first-order phase transition (FOPT) is a crucial open question in cosmology. We address this using a fully covariant…
Leptogenesis in the presence of density perturbations
Kenta Hotokezaka, Ryusuke Jinno, Rin Takada
We point out a new effect on the freeze-out process of heavy particles induced by density perturbations in the early universe, which we call ``acoustically driven freeze-out.'' Thi…