273 citations · 1.4k across the 54 of their papers we have counts for
6 papers · 1 filter
Reannihilation of self-interacting dark matter
Tobias Binder, Michael Gustafsson, Ayuki Kamada +2
We explore the phenomenology of having a second epoch of dark matter annihilation into dark radiation long after the standard thermal freeze-out. Such a hidden reannihilation proce…
Colder Freeze-in Axinos Decaying into Photons
Kyu Jung Bae, Ayuki Kamada, Seng Pei Liew +1
We point out that 7 keV axino dark matter (DM) in the R-parity violating (RPV) supersymmetric (SUSY) Dine-Fischler-Srednicki-Zhitnitsky model can simultaneously reproduce the 3.5ke…
Self-heating dark matter via semi-annihilation
Ayuki Kamada, Hee Jung Kim, Hyungjin Kim +1
The freeze-out of dark matter (DM) depends on the evolution of the DM temperature. The DM temperature does not have to follow the standard model one, when the elastic scattering is…
Light Axinos from Freeze-in: production processes, phase space distributions, and Ly- forest constraints
Kyu Jung Bae, Ayuki Kamada, Seng Pei Liew +1
We consider freeze-in production of 7 keV axino dark matter (DM) in the supersymmetric Dine-Fischler-Srednicki-Zhitnitsky (DFSZ) model in light of the 3.5 keV line excess. The warm…
Axion-like particle assisted strongly interacting massive particle
Ayuki Kamada, Hyungjin Kim, Toyokazu Sekiguchi
We propose a new realization of strongly interacting massive particles (SIMP) as self-interacting dark matter, where SIMPs couple to the Standard Model sector through an axion-like…
Dark matter kinetic decoupling with a light particle
Ayuki Kamada, Tomo Takahashi
We argue that the acoustic damping of the matter power spectrum is not a generic feature of the kinetic decoupling of dark matter, but even the enhancement can be realized dependin…