1.2k citations · 15.7k across the 225 of their papers we have counts for
228 papers
An axion constraint from the diffuse supernova neutrino background indicated by Super-Kamiokande
Kanji Mori, Tomoya Takiwaki, Kazunori Kohri +1
Recently, the Super-Kamiokande Collaboration reported an indication of the diffuse supernova neutrino background (DSNB) with a statistical significance of . Motivated by this…
Primordial Black Holes as Dark Matter and the Tachyonic Trap During Inflation
Yuma S. Furuta, Mindaugas Karčiauskas, Kazunori Kohri +1
We show that resonant processes during multi-field inflation can generate a large curvature perturbation on small scales. This perturbation naturally leads to the formation of prim…
The poltergeist mechanism -- Enhancement of scalar-induced gravitational waves with early matter-dominated era
Keisuke Inomata, Kazunori Kohri, Takahiro Terada
Gravitational waves induced by primordial density perturbations provide a powerful probe of the Universe's thermal history, which may include an early matter-dominated (eMD) era pr…
New constraints on axion with gamma-ray observations of the Crab Nebula
Kazunori Kohri, Haruki Takahashi
In this paper, we derive the upper bounds on the coupling of axion-like particles (ALPs) with photon as a function of the mass by considering axion-photon conversion in the Crab Ne…
Verifying the failing supernova constraint on dark photons with two-dimensional hydrodynamic simulations
Kanji Mori, Tomoya Takiwaki, Kazunori Kohri
Recent studies on the dark photon (DP) production in collapsing stars argue that the cooling effect induced by DPs can hinder supernova explosions and lead to a ``failing supernova…
Revisiting the limits on dark matter annihilation cross-section and decay lifetime in light of electron and positron fluxes
Nagisa Hiroshima, Kazunori Kohri, Partha Kumar Paul +1
We revisit the upper bound on the annihilation cross-section, of a stable dark matter (DM) of mass GeV by considering five different channels: $W^+…