13 citations · 22 across the 9 of their papers we have counts for
8 papers · 1 filter
Sommerfeld Enhancement in Spin-1 Electroweak Dark Matter
Tomohiro Abe, Motoko Fujiwara, Junji Hisano
We study a renormalizable spin-1 electroweakly interacting dark matter (DM) model in which the DM particle is the neutral component of a -odd triplet vector…
A radiative neutrino mass model with semi-annihilating boosted dark matter
Motoko Fujiwara, Takashi Toma
Boosted dark matter can provide a distinctive signature of a non-minimal dark sector. In this work, we construct a radiative neutrino mass model that allows for the production of b…
Dark matter spikes with strongly self-interacting particles
Boris Betancourt Kamenetskaia, Motoko Fujiwara, Alejandro Ibarra +1
An unavoidable prediction of scenarios with Dark Matter (DM) self-interactions is the existence of number changing processes that convert initial DM particles into final on…
Resummed multi-line gamma-ray spectra for Cherenkov Telescopes from heavy spin-1 dark matter
Motoko Fujiwara, Martin Vollmann
Electroweakly interacting stable spin-1 particle in the TeV mass range can be a dark matter candidate with rich testability. In particular, one or even two gamma-ray line-…
Boosted dark matter from semi-annihilations in the galactic center
Boris Betancourt Kamenetskaia, Motoko Fujiwara, Alejandro Ibarra +1
In some scenarios, the dark matter relic abundance is set by the semi-annihilation of two dark matter particles into one dark matter particle and one Standard Model particle. These…
Neutrino Diffusion within Dark Matter Spikes
Motoko Fujiwara, Gonzalo Herrera, Shunsaku Horiuchi
Multi-messenger observations of astrophysical transients provide powerful probes of the underlying physics of the source as well as beyond the Standard Model effects. We explore tr…
Tidal Disruption Events and Dark Matter Scatterings with Neutrinos and Photons
Motoko Fujiwara, Gonzalo Herrera
Stars can be tidally disrupted when passing near a black hole, and the debris can induce a flux of high-energy neutrinos. It has been discussed that there are hints in IceCube data…
Vortex Creep Heating vs. Dark Matter Heating in Neutron Stars
Motoko Fujiwara, Koichi Hamaguchi, Natsumi Nagata +1
Dark matter particles captured in neutron stars deposit their energy as heat. This DM heating effect can be observed only if it dominates over other internal heating effects in NSs…