Pendulum Leptogenesis

TL;DR

This paper introduces a novel non-thermal leptogenesis model during reheating, using a pendulum-like mechanism to generate lepton asymmetry, which explains baryon asymmetry and neutrino masses.

Contribution

It presents a new dynamical leptogenesis mechanism during reheating that combines inflaton oscillations with scalar lepton dynamics, inspired by a forced pendulum analogy.

Findings

Successfully reproduces observed baryon asymmetry.

Provides a link between leptogenesis and neutrino mass origin.

Demonstrates a novel pendulum-inspired dynamical system for leptogenesis.

Abstract

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.