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2021 Fall KIAS HEP Seminar Series

Self-Resonant Dark Matter

Name: Self-Resonant Dark Matter
Start: 2021-10-14T14:00:00+09:00
End: 2021-10-14T15:30:00+09:00
Location: No location set

by Seong-Sik Kim (Chung-Ang University)

Thursday 14 Oct 2021, 14:00 → 15:30 Asia/Seoul

Description

Title: Self-Resonant Dark Matter

Speaker: Seong-Sik Kim (Chung-Ang University)

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.

Videoconference

[Seminar] Seong-Sik Kim

Zoom Meeting ID: 81424694129
Host: KIAS HEP-PH Organizer
Passcode: 37390603
Zoom URL

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Self-Resonant Dark Matter

by Seong-Sik Kim (Chung-Ang University)