Annihilogenesis

Abstract

We investigate a novel interplay between the decay and annihilation of a particle whose mass undergoes a large shift during a first order phase transition, leading to the particles becoming trapped in the false vacuum and enhancing their annihilation rates as the bubbles of true vacuum expand. This opens up a large region of the parameter space where annihilations can be important. We apply this scenario to baryogenesis, where we find that annihilations can be enhanced enough to generate the requires baryon asymmetry even for relatively tiny annihilation cross sections with modest CP asymmetries.

References in corpus (6)

• Leptogenesis
• Primordial black holes from a cosmic phase transition: The collapse of Fermi-balls
• Fermi-ball dark matter from a first-order phase transition
• Probing the baryogenesis and dark matter relaxed in phase transition by gravitational waves and colliders
• Thermal Squeezeout of Dark Matter
• Baryogenesis via relativistic bubble walls

Cited by in corpus (9)

• Leptogenesis triggered by a first-order phase transition
• First-order phase transition and fate of false vacuum remnants
• Leptogenesis and Dark Matter Through Relativistic Bubble Walls with Observable Gravitational Waves
• Primordial black holes and curvature perturbations from false vacuum islands
• Pinning down the primordial black hole formation mechanism with gamma-rays and gravitational waves
• Detailed Calculation of Primordial Black Hole Formation During First-Order Cosmological Phase Transitions
• Sensitivity to Dark Sector Scales from Gravitational Wave Signatures
• Gravitational-wave signatures from reheating
• What happens when supercooling is terminated by curvature flipping of the effective potential?