Primordial Black Holes from First-Order Cosmological Phase Transitions

Baker, Michael J.; Breitbach, Moritz; Kopp, Joachim; Mittnacht, Lukas

doi:10.48550/arxiv.2105.07481

Cited by 32 publications

(50 citation statements)

References 65 publications

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“…The bubble wall velocity v w influences the rate at which the pockets contract. v w can be estimated from thermodynamic arguments, but this neglects the pressure exerted by χ particles reflecting off the wall, which could slow down the bubble expansion considerably [7,11,12]. We consider both relativistic and non-relativistic wall velocities, where the larger the wall velocity, the larger the mass needs to be in the broken phase in order to trap χ in the pockets.…”

Section: A Phase Transitionmentioning

confidence: 99%

“…The particles trapped in the pockets are eventually "squeezed" together, leading to a number of possible outcomes, depending on the specifics of their interactions. The squeezing could enhance their annihilation rate, which may determine the DM relic density [7], or increase the density sufficiently enough to create compact objects such as primordial black holes or Fermi-balls [11,12], which may themselves play the role of dark matter in the Universe today.…”

Section: Introductionmentioning

confidence: 99%

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Annihilogenesis

Arakawa,

Rajaraman,

Tait

2021

Preprint

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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.

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Section: A Phase Transitionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Annihilogenesis

Arakawa,

Rajaraman,

Tait

2021

Preprint

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“…One of such mechanisms is strongly first-order phase transition in the early Universe [26,27]. Recently, there are several works discussing new mechanisms of PBH production from first-order phase transition in the early universe [28][29][30][31][32]. In these works, the authors are mainly interested in explaining the possibility that PBHs play a role of dark matter.…”

Section: Introductionmentioning

confidence: 99%

Primordial black holes as a probe of strongly first-order electroweak phase transition

Hashino,

Kanemura,

Takahashi

2021

Preprint

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Primordial black holes can be produced by density fluctuations generated from delayed vacuum decays of first-order phase transition. The primordial black holes generated at the electroweak phase transition have masses of about 10 −5 solar mass. Such primordial black holes in the mass range can be tested by current and future microlensing observations, such as Subaru HSC, OGLE, PRIME and Roman telescope. Therefore, we may be able to explore new physics models with strongly first-order electroweak phase transition via primordial black holes. We examine this possibility by using models with first-order electroweak phase transition in the standard model effective field theory with dimension 6 and 8 operators. We find that depending on parameters of the phase transition a sufficient number of primordial black holes can be produced to be observed by above mentioned experiments. Our results would suggest that primordial black holes can be used as a new probe of models with strongly first-order electroweak phase transition, which has complementarity with measurements of the triple Higgs boson coupling at future collider experiments and observations of gravitational waves at future space-based interferometers.

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“…PBHs are typically thought to have been produced in the collapse of overdense regions developed from primordial inhomogeneities seeded by inflation [14,15]. They may also form directly during a first-order phase transition (FOPT) [16][17][18][19][20], perhaps through bubble collisions.…”

Section: Introductionmentioning

confidence: 99%

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

Marfatia¹,

Tseng²

2021

Preprint

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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 10 3 , 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 Xray/γ-ray background from PBH evaporation (at AMEGO-X/e-ASTROGAM).

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Primordial Black Holes from First-Order Cosmological Phase Transitions

Cited by 32 publications

References 65 publications

Annihilogenesis

Annihilogenesis

Primordial black holes as a probe of strongly first-order electroweak phase transition

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

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