Dec 2 – 6, 2024
IBS Building 4th Floor
Asia/Seoul timezone

[Seong-Sik Kim] Self-Resonant Dark Matter

Dec 2, 2024, 2:00 PM
45m
CTPU Seminar Room (IBS Building 4th Floor)

CTPU Seminar Room

IBS Building 4th Floor

55, Expo-ro, Yuseong-gu, Daejeon, Korea, 34126
Presentation

Description

We consider a new mechanism for enhancing the self-scattering and annihilation crosssections for dark matter with multiple components but without a light mediator. The lighter dark matter component plays a role of the u-channel pole in the elastic co-scattering for dark matter, leading to a large self-scattering cross section and a Sommerfeld enhancement for semi-annihilation processes. Taking the effective theory approach for self-resonant dark matter, we present various combinations of multiple dark matter components with spins and parities that show a u-channel pole in the co-scattering processes. Adopting dark photon and dark Higgs portals for self-resonant dark matter, we impose the relic density condition and indirect detection bounds on semi-annihilation channels with Sommerfeld enhancement and discuss potential signals for direct detection experiments.

Presentation materials