A multi-component SIMP model with U(1)X→ Z2 × Z3

Journal of High Energy Physics

Jinmian Li¹  Soo-Min Choi²  Pyungwon Ko³  Jinsu Kim⁴ 

[1] College of Physics, Sichuan University, 610065, Chengdu, China;Physik Department T31, Technische Universität München, James-Franck-Straße 1, D-85748, Garching, Germany;School of Physics, Korea Institute for Advanced Study, 02455, Seoul, Korea;Theoretical Physics Department, CERN, 1211, Geneva 23, Switzerland;

关键词: Beyond Standard Model;    Cosmology of Theories beyond the SM;    Gauge Symmetry;    Spontaneous Symmetry Breaking;   

DOI  :  10.1007/JHEP09(2021)028

来源: Springer

【 摘 要 】

Multi-component dark matter scenarios are studied in the model with U(1)X dark gauge symmetry that is broken into its product subgroup Z2 × Z3 á la Krauss-Wilczek mechanism. In this setup, there exist two types of dark matter fields, X and Y, distinguished by different Z2 × Z3 charges. The real and imaginary parts of the Z2-charged field, XR and XI, get different masses from the U(1)X symmetry breaking. The field Y, which is another dark matter candidate due to the unbroken Z3 symmetry, belongs to the Strongly Interacting Massive Particle (SIMP)-type dark matter. Both XI and XR may contribute to Y’s 3 → 2 annihilation processes, opening a new class of SIMP models with a local dark gauge symmetry. Depending on the mass difference between XI and XR, 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.

【 授权许可】

CC BY