Baryogenesis from Primordial Blackholes after Electroweak Phase Transition

Abstract

Incorporating a realistic model for accretion of ultra-relativistic particles by primordial blackholes (PBHs), we study the evolution of an Einstein-de Sitter universe consisting of PBHs embedded in a thermal bath from the epoch $\sim 10^{-33}$ sec to $\sim 5\times 10^{-9}$ sec. In this paper we use Barrow et al's ansatz to model blackhole evaporation in which the modified Hawking temperature goes to zero in the limit of the blackhole attaining a relic state with mass $\sim m_{pl}$. Both single mass PBH case as well as the case in which blackhole masses are distributed in the range $8\times 10^2-3\times 10^5$ gm have been considered in our analysis. Blackholes with mass larger than $\sim 10^5$ gm appear to survive beyond the electroweak phase transition and, therefore, successfully manage to create baryon excess via $X-\bar{X}$ emissions, averting the baryon number wash-out due to sphalerons. In this scenario, we find that the contribution to the baryon-to-entropy ratio by PBHs of initial mass $m$ is given by $\sim \epsilon \zeta (m/1gm{)}^{-1}$, where $\epsilon$ and $\zeta$ are the CP-violating parameter and the initial mass fraction of the PBHs, respectively. For $\epsilon$ larger than $\sim 10^{-4}$, the observed matter-antimatter asymmetry in the universe can be attributed to the evaporation of PBHs.

Latex2e file with seven figures included as postscript files

References in corpus (1)

• Electroweak Baryogenesis by Black Holes

Cited by in corpus (34)

• New cosmological constraints on primordial black holes
• Primordial Black Holes
• Baryon Asymmetry, Dark Matter, and Density Perturbation from PBH
• Dark Radiation and Superheavy Dark Matter from Black Hole Domination
• Gravitational Wave Production right after a Primordial Black Hole Evaporation
• Non-Cold Dark Matter from Primordial Black Hole Evaporation
• Fundamental Particle Structure in the Cosmological Dark Matter
• GUT Baryogenesis With Primordial Black Holes
• Primordial Black Holes from Cosmic Domain Walls
• Effect of Vacuum Energy on Evolution of Primordial Black Holes in Einstein Gravity
• Primordial Black Hole Baryogenesis
• Primordial Black Hole Evaporation and Spontaneous Dimensional Reduction
• Accretion, Primordial Black Holes and Standard Cosmology
• Black Hole Production of Monopoles in the Early Universe
• Baryon asymmetry of the Universe from evaporation of primordial black holes
• Effect of accretion on primordial black holes in Brans-Dicke theory
• Status of Electroweak Phase Transition and Baryogenesis
• Interacting black holes on the brane: the seeding of binaries
• Interacting Holographic Dark Energy, the Present Accelerated Expansion and Black Holes
• Curved spacetime effective field theory (cEFT) -- construction with the heat kernel method
• Phantom energy accretion and primordial black holes evolution in Brans-Dicke theory
• Electroweak Baryogenesis in a Cold Universe
• Black Hole Dynamics in Power-law based Metric $f(R)$ Gravity
• Dark sector production and baryogenesis from not quite black holes
• Evolution of Primordial Black Hole Mass Spectrum in Brans-Dicke Theory
• Non-collider searches for stable massive particles
• Gravitino production in a thermal Universe revisited
• Constraints on primordial black holes from interstellar dust temperature in the Galaxy
• Stochastic gravitational wave background from accreting primordial black hole binaries during early inspiral stage
• Vacuum energy and Primordial Black Holes in Brans-Dicke Theory
• Percolating Cosmic String loops from evaporating primordial black holes
• Neutrino Emission and Plasma Heating from Primordial Black Holes: An Improved Approach to $N_{\mathrm{eff}}$ Constraints
• Black Hole Menagerie, Charged/Dyonic BHs and Radiation from Interacting Dyonic BH Pairs
• Evolution of primordial black holes in an adiabatic FLRW universe with gravitational particle creation