Speaker
Neil Barrie
(Kavli IPMU)
Description
We propose a new non-thermal Leptogenesis mechanism that takes
place during the reheating epoch, and utilizes the Ratchet mechanism. The
interplay between the oscillation of the inflaton during reheating and a
scalar lepton leads to a dynamical system that emulates the well-known
forced pendulum. This is found to produce driven motion in the phase of the
scalar lepton which leads to the generation of a non-zero lepton number
density that is later redistributed to baryon number via sphaleron
processes. This model successfully reproduces the observed baryon
asymmetry, while simultaneously providing an origin for neutrino masses via
the seesaw mechanism.
