1 research outputs found
Particle production from symmetry breaking after inflation and leptogenesis
Recent studies suggest that the process of symmetry breaking after inflation
typically occurs very fast, within a single oscillation of the
symmetry-breaking field, due to the spinodal growth of its long-wave modes,
otherwise known as `tachyonic preheating'. We show how this sudden transition
from the false to the true vacuum can induce a significant production of
particles, bosons and fermions, coupled to the symmetry-breaking field. We find
that this new mechanism of particle production in the early Universe may have
interesting consequences for the origin of supermassive dark matter and the
generation of the observed baryon asymmetry through leptogenesis.Comment: 17 pages, 2 figures. Significantly enlarged version, including a more
detailed discussion of leptogenesis. To appear in Physics Letters