Speaker
Description
Gravitational wave detection has revived primordial black holes (PBHs) as a compelling dark matter candidate. While their existence remains uncertain, we look for a physically motivated PBH extended mass distribution. We compute the cosmic trajectories generated by the baryon $b$ and lepton asymmetries $l_\alpha$ and their associated cosmic Equation of State (EoS) from 10 GeV to 1 keV; through the QCD transition and the neutrino oscillation. Using state-of-the-art models, we scan the parameter space of $b$ and $l_\alpha$ and search for potential observational consequences through the associated EoS and PBH mass distribution. It remains unclear whether the current constraints on PBHs can apply to such extended distributions. These compelling objects could be messengers of the pre-Big Bang Nucleosynthesis era through their induced Gravitational Waves Background for instance. Their signature could be hinting at the fundamental asymmetries encoded in the cosmos.