A Radiative Neutrino Mass Model with SIMP Dark Matter
Speaker:
Shu-Yu Ho (California Institute of Technology)
Time:
07/01 (Sat.) 15:00 PDT, 16:00 MDT, 17:00 CDT, 18:00 EDT,
07/02 (Sun.) 06:00 Taiwan
Link:
Join the talk on BlueJeans: https://bluejeans.com/6366170552/
Abstract:
We propose the first viable radiative seesaw model, in which the neutrino
masses are induced radiatively via the two-loop Feynman diagram involving
Strongly Interacting Massive Particles (SIMP). The stability of SIMP dark
matter (DM) is ensured by a ℤ5 discrete symmetry, through which the
DM annihilation rate is dominated by the 3→2 self-annihilating processes.
The right amount of thermal relic abundance can be obtained with perturbative
couplings in the resonant SIMP scenario, while the astrophysical bounds
inferred from the Bullet cluster and spherical halo shapes can be satisfied. We
show that SIMP DM is able to maintain kinetic equilibrium with thermal plasma
until the freeze-out temperature via the Yukawa interactions associated with
neutrino mass generation.
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