5 research outputs found
Dark matter from the centre of SU(N)
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 gauge group, and show that the centre of , the discrete
subgroup also known as -ality, can ensure the stability of scalar DM
particles. We analyse in some details two minimal DM models of this class,
based on and , respectively. These models have non-trivial
patterns of spontaneous symmetry breaking, leading to distinctive
phenomenological implications. For the 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 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.Comment: 30 pages, 6 figures, version accepted for publication in Scipost
Physics, 1 figure adde
Dark matter from the centre of SU(N)
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 gauge group, and show that the centre of , the discrete subgroup also known as -ality, can ensure the stability of scalar DM particles. We analyse in some details two minimal DM models of this class, based on and , respectively. These models have non-trivial patterns of spontaneous symmetry breaking, leading to distinctive phenomenological implications. For the 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 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.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 gauge group, and show that the centre of , the discrete subgroup also known as -ality, can ensure the stability of scalar DM particles. We analyse in some details two minimal DM models of this class, based on and , respectively. These models have non-trivial patterns of spontaneous symmetry breaking, leading to distinctive phenomenological implications. For the 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 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