Conveners
Session 13
- Chair: Yuber F Perez-Gonzalez
The transition epoch between the end of inflation and the beginning of thermal radiation domination, known as ‘reheating’, remains as one of the fundamental open problems in Cosmology. During the earliest stages of reheating, the oscillating inflaton condensate is supposed to decay non-perturbatively (via parametric resonance) into other lighter bosonic degrees of freedom that are coupled to...
We consider primordial black holes formation from adiabatic cosmological perturbation of the Early Universe dominated by a massless scalar field. These are sourced by a time independent curvature profile imposed on super horizon scale, corresponding to pure growing modes of the scalar field. Assuming spherical symmetry we study the collapse of these cosmological perturbations using the...
Phase transitions can have a dramatic impact on physics in the early universe. We illustrate this by discussing a novel mechanism of dark matter production and a related novel mechanism of primordial black hole production, both of which hinge on cosmological phase transitions.
