论文标题
Su（N）中心的暗物质
Dark matter from the centre of SU(N)
论文作者
论文摘要
一个具有非亚伯仪对称性的黑暗区域为稳定的暗物质（DM）候选提供了合理的声音框架。我们考虑在$ su（n）$ gauge组下收取的标量字段，并表明$ su（n）$的中心，离散的子组$ z_n $也称为$ n $ - 性，可以确保标量DM粒子的稳定性。我们分析了该类别的两个最小DM模型，分别基于$ SU（2）$和$ SU（3）$。这些模型具有自发对称性破坏的非平凡模式，从而导致了独特的现象学意义。对于$ su（2）$模型，这些包括两个DM状态的特定相互作用，具有相同的相互作用，但质量不同，并且在黑暗部门或通过Higgs Portal内部或通过Higgs Portal。 $ su（3）$模型预测了由一对带有独特量规耦合的深色光子制成的深色辐射，以及DM半通量变为主导和可测试的机制。
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.
