273 citations · 1.4k across the 54 of their papers we have counts for
10 papers · 1 filter
Escalating core formation with dark matter self-heating
Ayuki Kamada, Hee Jung Kim
Exothermic scatterings of dark matter (DM) produce DM particles with significant kick velocities inside DM halos. In collaboration with DM self-interaction, the excess kinetic ener…
Lessons from on inflation models: two-loop renormalization of in the scalar QED
Ayuki Kamada, Takumi Kuwahara
A non-minimal coupling has been attracting growing interest particularly in the context of inflation models, though its quantum nature is not clear yet. We study the renormaliz…
Lessons from on inflation models: two-scalar theory and Yukawa theory
Ayuki Kamada, Takumi Kuwahara
We demonstrate two properties of the trace of the energy-momentum tensor in the flat spacetime. One is the decoupling of heavy degrees of freedom; i.e., heavy degrees o…
Unification for the Darkly Charged Dark Matter
Ayuki Kamada, Masaki Yamada, Tsutomu T. Yanagida
We provide a simple UV theory for a Dirac dark matter with a massless Abelian gauge boson. We introduce a single fermion transforming as the representation in the SO(10)$…
Constraining FIMP from the structure formation of the Universe: analytic mapping from
Ayuki Kamada, Keisuke Yanagi
A feebly interacting massive particle (FIMP), contrasting with a weakly interacting massive particle (WIMP), is an intriguing dark matter (DM) candidate. Light (keV-scale) FIMP DM…
Baryon-Dark Matter Coincidence in Mirrored Unification
Masahiro Ibe, Ayuki Kamada, Shin Kobayashi +2
About 80\% of the mass of the present Universe is made up of the unknown (dark matter), while the rest is made up of ordinary matter. It is a very intriguing question why the {\it…
Fingerprint matching of beyond-WIMP dark matter: neural network approach
Kyu Jung Bae, Ryusuke Jinno, Ayuki Kamada +1
Galactic-scale structure is of particular interest since it provides important clues to dark matter properties and its observation is improving. Weakly interacting massive particle…
Unification of the Standard Model and Dark Matter Sectors in [SU(5)U(1)]
Ayuki Kamada, Masaki Yamada, Tsutomu T. Yanagida
A simple model of dark matter contains a light Dirac field charged under a hidden U(1) gauge symmetry. When a chiral matter content in a strong dynamics satisfies the t'Hooft anoma…
On Scalaron Decay via the Trace of Energy-Momentum Tensor
Ayuki Kamada
In some inflation scenarios such as inflation, a gravitational scalar degrees of freedom called scalaron is identified as inflaton. Scalaron linearly couples to matter via…
Smallest Halos in Thermal Wino Dark Matter
Shin'ichiro Ando, Ayuki Kamada, Toyokazu Sekiguchi +1
(Mini) split supersymmetry explains the observed Higgs mass and evades stringent constraints, while keeping good features of TeV-scale supersymmetry other than the little hierarchy…