10 papers · 1 filter
Acoustically driven dark matter freeze-out
Iason Baldes, Ryusuke Jinno
We extend the study of the effect of density perturbations to the well known thermal dark matter freeze-out scenario. We find enhancements in the cross section are…
Leptogenesis with perturbations in type-II and type-III seesaw models
Iason Baldes
Density perturbations have recently been shown to lead to a novel effect in the freeze-out of heavy particles called "acoustically driven freeze-out." This leads to an enhancement…
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…
Primordial black holes as dark matter: Interferometric tests of phase transition origin
Iason Baldes, María Olalla Olea-Romacho
We show that primordial black holes - in the observationally allowed mass window with - formed from late nucleating patches in a first order phase transition imply…
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…
Indirect searches for dark matter bound state formation and level transitions
Iason Baldes, Francesca Calore, Kalliopi Petraki +2
Indirect searches for dark matter (DM) have conventionally been applied to the products of DM annihilation or decay. If DM couples to light force carriers, however, it can be captu…