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257 papers · 1 filter
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…
Axions at the meV Crossroads: Theory, Cosmology, Astrophysics, and Experiments
Michele Cicoli, Francesco D'Eramo, Luca Di Luzio +18
The meV mass range has emerged as a focal point in axion physics, where advances in theory, cosmology, astrophysics, and experimental techniques converge. Axions in this mass range…
Perturbative limits on axion-SU(2) gauge dynamics during inflation from the energy density of spin-2 particles
Koji Ishiwata, Eiichiro Komatsu
We investigate the conditions under which the perturbative treatment of the backreaction of spin-2 particles on the dynamics of an axion-SU(2) gauge field system breaks down during…
Pseudo-Nambu-Goldstone-boson Dark Matter from Three Complex Scalars
Riasat Sheikh, Takashi Toma, Koji Tsumura
This study explores a dark matter model in which a pseudo-Nambu-Goldstone boson arises as a viable dark matter candidate from the spontaneous and soft breaking of global $\mathrm{U…
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…
Minimal dark matter in grand unification
Takashi Toma
Minimal dark matter is an attractive candidate for dark matter because it is stabilized without the need to impose additional symmetries. It is known that the quintuplet…