Doubly peaked induced stochastic gravitational wave background : Testing baryogenesis from primordial black holes

Understand

Hawking evaporation of primordial black holes (PBHs) can facilitate the generation of matter-antimatter asymmetry.

• We focus on ultra-low mass PBHs that briefly dominate the universe and evaporate before the big bang nucleosynthesis.
• We propose a novel test of this scenario by detecting its characteristic doubly peaked gravitational wave (GW) spectrum in future GW observatories.
• Here the first order adiabatic perturbation from inflation and from the isocurvature perturbations due to PBH distribution, source tensor perturbations in second-order and lead to two peaks in the induced GW background.