359 citations · 2.7k across the 60 of their papers we have counts for
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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…
Cancellation of one-loop correction to soft tensor power spectrum
Yohei Ema, Muzi Hong, Ryusuke Jinno +1
We demonstrate that there are no scale-invariant one-loop corrections to the superhorizon tensor perturbations from small-scale (potentially enhanced) scalar perturbations, irrespe…
Graviton-photon conversion in stochastic magnetic fields
Wataru Chiba, Ryusuke Jinno, Kimihiro Nomura
We study graviton-photon conversion in the presence of stochastic magnetic fields. Assuming Gaussian magnetic fields that may possess nontrivial helicity, and unpolarized gravitati…
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…