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Article
Report number arXiv:2103.05956 ; TUM-HEP-1319/21 ; CERN-TH-2021-030 ; KIAS-P21008
Title A multi-component SIMP model with $U(1)_X \rightarrow Z_2 \times Z_3$
Author(s) Choi, Soo-Min (Munich, Tech. U.) ; Kim, Jinsu (CERN) ; Ko, Pyungwon (Korea Inst. Advanced Study, Seoul) ; Li, Jinmian (Sichuan U.)
Publication 2021-09-06
Imprint 2021-03-10
Number of pages 25
Note v1: 25 pages; v2: 27 pages, references updated, analysis improved; v3: 31 pages, version accepted for publication in JHEP
In: JHEP 2109 (2021) 028
DOI 10.1007/JHEP09(2021)028
Subject category astro-ph.CO ; Astrophysics and Astronomy ; hep-ph ; Particle Physics - Phenomenology
Abstract Multi-component dark matter scenarios are studied in the model with $U(1)_X$ dark gauge symmetry that is broken into its product subgroup $Z_2 \times Z_3$á la Krauss-Wilczek mechanism. In this setup, there exist two types of dark matter fields, $X$ and $Y$, distinguished by different $Z_2 \times Z_3$ charges. The real and imaginary parts of the $Z_2$-charged field, $X_R$ and $X_I$, get different masses from the $U(1)_X$ symmetry breaking. The field $Y$, which is another dark matter candidate due to the unbroken $Z_3$ symmetry, belongs to the Strongly Interacting Massive Particle (SIMP)-type dark matter. Both $X_I$ and $X_R$ may contribute to $Y$'s $3\rightarrow 2$ annihilation processes, opening a new class of SIMP models with a local dark gauge symmetry. Depending on the mass difference between $X_I$ and $X_R$, we have either two-component or three-component dark matter scenarios. In particular two- or three-component SIMP scenarios can be realised not only for small mass difference between $X$ and $Y$, but also for large mass hierarchy between them, which is a new and unique feature of the present model. We consider both theoretical and experimental constraints, and present four case studies of the multi-component dark matter scenarios.
Copyright/License preprint: (License: CC-BY-4.0)
publication: © 2021-2025 The Authors (License: CC-BY-4.0), sponsored by SCOAP³



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