Conveners
Reheating and Big-Bang Nucleosynthesis
- Francesco D'Eramo (University of Padua)
We present an updated analysis of cosmological models with very low reheating scenarios, where TRH∼O(MeV). Our study includes a more precise computation of neutrino distribution functions, leveraging the latest datasets from cosmological surveys. We perform a joint analysis that combines constraints from Big Bang Nucleosynthesis, the Cosmic Microwave Background, and galaxy surveys, alongside...
In this talk I discuss the constraints imposed by BBN and CMB observations on primordial lepton flavour asymmetries with vanishing total lepton number. I show that solving the momentum averaged quantum kinetic equations describing neutrino oscillations and interactions is an accurate approximation to the full momentum-dependent system, and the results reveal a rich flavour structure in stark...
One of the many compelling mechanisms for dark matter production is the freeze-in mechanism. In contrast to the more widely studied freeze-out scenario, freeze-in production is sensitive to thermal corrections, which can significantly impact the predicted dark matter abundance.
In this talk, we investigate the impact of thermal effects on dark matter production. We consider a model...
QCD-like theories in which the dark matter (DM) of the Universe is hypothesized to be a thermal relic in the form of a dark pion has been extensively investigated, with most studies neglecting the CP-violating
θ-angle associated with the topological vacuum. We point out that a non-vanishing θ could potentially trigger resonant number-changing processes giving rise to the observed relic...
