Pseudo-Goldstone dark matter: gravitational waves and direct-detection blind spots

Understand

Pseudo-Goldstone dark matter is a thermal relic with momentum-suppressed direct-detection cross section.

• We study the most general model of pseudo-Goldstone dark matter arising from the complex-singlet extension of the Standard Model.
• The new U(1) symmetry of the model is explicitly broken down to a CP-like symmetry stabilising dark matter.
• We study the interplay of direct-detection constraints with the strength of cosmic phase transitions and possible gravitational-wave signals.