Dark matter from the centre of SU(N)

Frigerio, Michele; Grimbaum-Yamamoto, Nicolas; Hambye, Thomas

doi:10.21468/SciPostPhys.15.4.177

SciPost Physics

Dark matter from the centre of SU(N)

Michele Frigerio, Nicolas Grimbaum-Yamamoto, Thomas Hambye

SciPost Phys. 15, 177 (2023) · published 25 October 2023

doi: 10.21468/SciPostPhys.15.4.177
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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.

TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.15.4.177
TI  - Dark matter from the centre of SU(N)
PY  - 2023/10/25
UR  - https://www.scipost.org/SciPostPhys.15.4.177
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 15
IS  - 4
SP  - 177
A1  - Frigerio, Michele
AU  - Grimbaum-Yamamoto, Nicolas
AU  - Hambye, Thomas
AB  - 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.
ER  -

@Article{10.21468/SciPostPhys.15.4.177,
	title={{Dark matter from the centre of SU(N)}},
	author={Michele Frigerio and Nicolas Grimbaum-Yamamoto and Thomas Hambye},
	journal={SciPost Phys.},
	volume={15},
	pages={177},
	year={2023},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.15.4.177},
	url={https://scipost.org/10.21468/SciPostPhys.15.4.177},
}

Cited by 4

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¹ Michele Frigerio,
² Nicolas Grimbaum-Yamamoto,
² ³ Thomas Hambye

Funders for the research work leading to this publication

Fonds De La Recherche Scientifique - FNRS (FNRS) (through Organization: Fonds National de la Recherche Scientifique [FNRS])
Fédération Wallonie-Bruxelles
Horizon 2020 (through Organization: European Commission [EC])
Université Libre de Bruxelles