Jul 4 – 11, 2018
COEX, SEOUL
Asia/Seoul timezone

Unitarizing SIMP scenario with dark vector resonances

Jul 5, 2018, 9:30 AM
15m
104 (COEX, Seoul)

104

COEX, Seoul

Parallel Astro-particle Physics and Cosmology Astro-particle Physics and Cosmology

Speaker

Soo-Min Choi (Chung-Ang University)

Description

We investigate a scenario of Strongly Interacting Massive Particles (SIMPs) where the thermal relic density of dark pion dark matter (DM) is determined by number changing 3→2 annihilations in a strongly interacting dark sector. In this scenario, including dark vector mesons in the hidden local symmetry scheme, we find that dark vector mesons unitarize the dark chiral perturbation theory (ChPT) efficiently and extend the range of validity of the leading order calculations. In QCD-like theories with SU(3)_L×SU(3)_R/SU(3)_V flavor symmetry, we show explicitly that the inclusion of these dark vector mesons in the 3→2 annihilation and 2→2 self-scattering of DM eliminates the tension between the Bullet Cluster bound and the relic density condition in a wide parameter space.

Primary authors

Alexander Natale (Korea Institute for Advanced Study) Soo-Min Choi (Chung-Ang University) pyungwon ko (Korea Inst. for Advanced Study (KIAS)) Prof. Hyun Min Lee (Chung-Ang University)

Presentation materials