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 dark matter with a triple coupling, we find that one of dark matter particles leads to an u-channel resonance in dark matter elastic scattering. From the sum of the u-channel ladder diagrams, we obtain a Bethe-Salpeter equation with a delay term and identify the Sommerfeld factor from the elastic scattering of two dark matter components for the first time. We discuss the implications of our results for enhancing dark matter self-scattering and annihilation.

Details

Title
Self-resonant dark matter
Author
Seong-Sik, Kim 1 ; Lee Hyun Min 1   VIAFID ORCID Logo  ; Zhu, Bin 2 

1  Chung-Ang University, Department of Physics, Seoul, Korea (GRID:grid.254224.7) (ISNI:0000 0001 0789 9563) 
2  Chung-Ang University, Department of Physics, Seoul, Korea (GRID:grid.254224.7) (ISNI:0000 0001 0789 9563); Yantai University, School of Physics, Yantai, China (GRID:grid.440761.0) (ISNI:0000 0000 9030 0162) 
Publication year
2021
Publication date
Oct 2021
Publisher
Springer Nature B.V.
e-ISSN
10298479
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1007/JHEP10(2021)239
ProQuest document ID
2588177182
Copyright
© The Author(s) 2021. This work is published under CC-BY 4.0 (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.