111 citations · 515 across the 8 of their papers we have counts for
8 papers
Flaxino dark matter and stau decay
Eung Jin Chun, Hang Bae Kim, Kazunori Kohri +1
If the spontaneous breaking of Peccei-Quinn symmetry comes from soft supersymmetry breaking, the fermionic partners of the symmetry-breaking fields have mass of order the gravitino…
Black hole formation and slow-roll inflation
Kazunori Kohri, David H. Lyth, Alessandro Melchiorri
Black hole formation may occur if the spectrum of the curvature perturbation ζincreases strongly as the scale decreases. As no such increase is observed on cosmological scales, bla…
Solving the cosmic lithium problems with primordial late-decaying particles
Daniel Cumberbatch, Kazuhide Ichikawa, Masahiro Kawasaki +3
We investigate the modifications to predictions for the abundances of light elements from standard Big-Bang nucleosynthesis when exotic late-decaying particles with lifetimes excee…
More hilltop inflation models
Kazunori Kohri, Chia-Min Lin, David H. Lyth
Using analytic expressions, we explore the parameter space for hilltop inflation models with a potential of the form . With the positive sign and p>2 this conv…
Cosmological Constraints on Neutrino Injection
Toru Kanzaki, Masahiro Kawasaki, Kazunori Kohri +1
We derive general constraints on the relic abundances of a long-lived particle which mainly decays into a neutrino (and something else) at cosmological time scales. Such an exotic…
Possible solution to the Li problem by the long lived stau
Toshifumi Jittoh, Kazunori Kohri, Masafumi Koike +3
Modification of standard big-bang nucleosynthesis is considered in the minimal supersymmetric standard model to resolve the excessive theoretical prediction of the abundance of pri…