# Parametrized leptogenesis from linear seesaw

## TL;DR

This paper proposes a novel leptogenesis mechanism within a linear seesaw framework that links baryon asymmetry to charged lepton and neutrino masses, with testable predictions for future experiments.

## Contribution

It introduces a new leptogenesis scenario based on a linear seesaw in a left-right symmetric model, connecting baryon asymmetry to lepton masses and neutrino properties.

## Key findings

- Lepton asymmetries are generated through mirror charged lepton decays.
- Part of the asymmetries are washed out by Majorana neutrino processes.
- The model favors a normal hierarchical neutrino spectrum.

## Abstract

We present a purely linear seesaw mechanism in a left-right symmetric framework and then realize a novel leptogenesis scenario for parametrizing the cosmic baryon asymmetty by the charged lepton masses and the light Majorana neutrino mass matrix up to an overall factor. Through the same Yukawa couplings, the lepton-number-conserving decays of the mirror charged leptons can generate three individual lepton asymmetries stored in the ordinary lepton flavors, while the lepton-number-violating processes for the Majorana neutrino mass generation can wash out part of these lepton asymmetries. The remnant lepton asymmetries then can be partially converted to a baryon asymmetry by the sphaleron processes. Our scenario prefers a normal hierarchical neutrino spectrum so that it could be verified by the future data from cosmological observations, neutrino oscillations and neutrinoless double beta decay.