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Dark matter from the centre of SU(N)
- Publication Year :
- 2023
- Publisher :
- HAL CCSD, 2023.
-
Abstract
- A dark sector with non-abelian gauge symmetry provides a sound framework to justify stable dark matter (DM) candidates. We consider scalar fields charged under a $SU(N)$ gauge group, and show that the centre of $SU(N)$, the discrete subgroup $Z_N$ also known as $N$-ality, can ensure the stability of scalar DM particles. We analyse in some details two minimal DM models of this class, based on $SU(2)$ and $SU(3)$, respectively. These models have non-trivial patterns of spontaneous symmetry breaking, leading to distinctive phenomenological implications. For the $SU(2)$ model these include a specific interplay of two DM states, with the same interactions but different masses, and several complementary DM annihilation regimes, either within the dark sector or through the Higgs portal. The $SU(3)$ model predicts dark radiation made of a pair of dark photons with a unique gauge coupling, as well as regimes where DM semi-annihilations become dominant and testable.<br />27 pages, 5 figures
- Subjects :
- scalar
photon
FOS: Physical sciences
spontaneous symmetry breaking
stability
field theory
dark matter
[PHYS.HPHE] Physics [physics]/High Energy Physics - Phenomenology [hep-ph]
High Energy Physics - Phenomenology
High Energy Physics - Phenomenology (hep-ph)
annihilation
SU(2)
SU(3)
gauge
nonabelian
coupling
symmetry
SU(N)
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....dcbc7ed40eb0de90a7993c2f09fbb2a5