6 papers
Did IceCube discover Dark Matter around Blazars?
Andrea Giovanni De Marchi, Alessandro Granelli, Jacopo Nava +1
Models of blazar jets, that explain observations of their photon spectra, typically predict too few neutrinos to be possibly seen by existing telescopes. In particular, they fall s…
From oversimplified to overlooked: the case for exploring Rich Dark Sectors
Asli Abdullahi, Francesco Costa, Andrea Giovanni De Marchi +9
The Standard Model (SM) of particle physics provides a very successful description of fundamental particles and their interactions but it is incomplete, as neutrino masses, dark ma…
Bubbletrons: Ultrahigh-Energy Particle Collisions and Heavy Dark Matter at Phase Transitions
Iason Baldes, Maximilian Dichtl, Yann Gouttenoire +1
We initiate the study of `bubbletrons', by which we mean ultra-high-energy collisions of the particle shells that generically form at the walls of relativistic bubbles in cosmologi…
ALP leptogenesis
Martina Cataldi, Alberto Mariotti, Filippo Sala +1
We propose a novel realisation of leptogenesis that relies on the out-of-equilibrium decay of an axion-like particle (ALP) into right-handed Majorana neutrinos (RHNs) in the early…
Relic Neutrino Background from Cosmic-Ray Reservoirs
Andrea Giovanni De Marchi, Alessandro Granelli, Jacopo Nava +1
We compute the flux of relic neutrino background (RB) up-scattered by ultra-high-energy (UHE) cosmic rays (CRs) in clusters that act as CR-reservoirs. The long trapping times o…
Particle shells from relativistic bubble walls
Iason Baldes, Maximilian Dichtl, Yann Gouttenoire +1
Relativistic bubble walls from cosmological phase transitions (PT) necessarily accumulate expanding shells of particles. We systematically characterize shell properties, and identi…