242 citations · 2.1k across the 39 of their papers we have counts for
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Inflationary primordial black holes for the LIGO gravitational wave events and pulsar timing array experiments
Keisuke Inomata, Masahiro Kawasaki, Kyohei Mukaida +2
Primordial black holes (PBHs) are one of the candidates to explain the gravitational wave (GW) signals observed by the LIGO detectors. Among several phenomena in the early Universe…
Squeezed Bispectrum in the Formalism: Local Observer Effect in Field Space
Yuichiro Tada, Vincent Vennin
The prospects of future galaxy surveys for non-Gaussianity measurements call for the development of robust techniques for computing the bispectrum of primordial cosmological pertur…
PBH Dark Matter in Supergravity Inflation Models
Masahiro Kawasaki, Alexander Kusenko, Yuichiro Tada +1
We propose a novel scenario to produce abundant primordial black holes (PBHs) in new inflation which is a second phase of a double inflation in the supergravity frame work. In our…
Revisiting constraints on small scale perturbations from big-bang nucleosynthesis
Keisuke Inomata, Masahiro Kawasaki, Yuichiro Tada
We revisit the constraints on the small scale density perturbations () from the modification of the freeze-out va…