Speaker
Hyun Min Lee
(Chung-Ang University)
Description
We consider a new mechanism for enhancing the self-scattering of dark matter without a light mediator or a sub-GeV dark matter. The mechanism relies on the u-channel resonance from a dark matter particle in models with at least two components of dark matter with self-couplings. We develop the Bethe-Salpeter formalism for obtaining the non-perturbative cross section and the Sommerfeld enhancement factor for two-component dark matter and discuss the implications for dark matter self-scattering and annihilation and a model building with multi-component dark matter.
