- Dark matter from the centre of SU(N) arxiv link

Auteur(s): Frigerio M., Grimbaum-Yamamoto Nicolas, Hambye Thomas

(Document sans référence bibliographique)
Texte intégral en Openaccess : arxiv

Ref HAL: hal-03927602_v1
Ref Arxiv: 2212.11918
Ref INSPIRE: 2617479
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote

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.