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FIELD Phys:Particle Physics
DATE October 14 (Thu), 2021
TIME 14:00-15:30
PLACE Online
SPEAKER Seong-Sik Kim
HOST Park, Jae-hyeon
INSTITUTE Chung-Ang University
TITLE Self-Resonant Dark Matter
ABSTRACT

We present a novel mechanism for Sommerfeld enhancement for dark matter interactions without the need for light mediators. Considering a model for two-component scalar dark matter with a triple coupling, we find that there appears an u-channel resonance in dark matter elastic scattering. From the sum of the corresponding ladder diagrams, we obtain a Bethe-Salpeter equation with a delay term and identify the Sommerfeld factor for two-component dark matter from the effective Yukawa potential for the first time. We discuss the implications of our results for enhancing dark matter self-scattering and annihilation.

https://indico.kias.re.kr/event/66

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