Correlated signals of first-order phase transitions and primordial black hole evaporation

Abstract

Abstract Fermi balls produced in a cosmological first-order phase transition may collapse to primordial black holes (PBHs) if the fermion dark matter particles that comprise them interact via a sufficiently strong Yukawa force. We show that phase transitions described by a quartic thermal effective potential with vacuum energy, 0.1 ≲ B 1/4/MeV ≲ 103, generate PBHs of mass, 10 −20 ≲ M PBH/M ⊙ ≲ 10 −16, and gravitational waves from the phase transition (at THEIA/μAres) can be correlated with an isotropic extragalactic X-ray/γ-ray background from PBH evaporation (at AMEGO-X/e-ASTROGAM).

Keywords

• Black Holes
• Cosmology of Theories BSM
• Phase Transitions in the Early Universe