Pseudo-Nambu-Goldstone Dark Matter from Non-Abelian Gauge Symmetry

Understand

We propose a pseudo-Nambu-Goldstone boson (pNGB) dark matter (DM) model based on an additional non-Abelian gauge symmetry $SU(2)_D$.

• The gauge symmetry $SU(2)_D$ is spontaneously broken to a global custodial symmetry $U(1)_V$ via the nonvanishing vacuum expectation values of $SU(2)_D$ doublet and triplet scalar fields.
• Due to the exact global symmetry $U(1)_V$, the lightest $U(1)_V$ charged particle becomes stable.
• We assume that the lightest charged particle in the model is the charged complex pNGB, which we regard as DM.