Correlated gravitational wave and microlensing signals of macroscopic dark matter

Abstract

Abstract Fermion dark matter particles can aggregate to form extended dark matter structures via a first-order phase transition in which the particles get trapped in the false vacuum. We study Fermi balls created in a phase transition induced by a generic quartic thermal effective potential. We show that for Fermi balls of mass, 3 × 10 −12 M ⊙ ≲ M FB ≲ 10 −5 M ⊙, correlated observations of gravitational waves produced during the phase transition (at SKA/THEIA/μAres), and gravitational microlensing caused by Fermi balls (at Subaru-HSC), can be made.

Keywords

• Dark matter
• Phase transitions
• Other experiments