Ennio Salvioni: Split SIMPs with decays

Thursday 16 Jul 2020, 15:00 → 16:00 Europe/Zurich

Zoom only (CERN)

(2006.15148) I discuss strongly interacting massive particle (SIMP) dark matter in a dark copy of QCD. One of the dark mesons is necessarily unstable but long-lived, with potential impact on CMB observables. An approximate isospin symmetry plays a crucial role, stabilizing the dark matter and allowing to split sufficiently the masses of the other states to suppress strongly their relic abundances. I present the first analysis of SIMP cosmology with sizable mass splittings between all meson multiplets, and discuss phenomenological implications. Cosmological, astrophysical, and terrestrial probes are combined into a global picture of the parameter space.

https://cern.zoom.us/j/99113688676