Corrigendum to "Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis"

TL;DR

This paper corrects previous discussions on resonant leptogenesis models, demonstrating that minimal radiative models cannot generate asymmetry at a certain order, and proposes a modified model with observable signatures.

Contribution

It amends prior work by clarifying the viability of minimal models and introduces a minimal modification enabling successful leptogenesis with testable predictions.

Findings

Minimal radiative models cannot generate asymmetry at  order.

A minimal model modification allows successful leptogenesis.

Fully flavour-covariant rate equations are essential for accurate predictions.

Abstract

We amend the incorrect discussion in Nucl. Phys. B 886 (2014) 569 [1] concerning the numerical examples considered there. In particular, we discuss the viability of minimal radiative models of Resonant Leptogenesis and prove that no asymmetry can be generated at $\mathcal{O}(h^4)$ in these scenarios. We present a minimal modification of the model considered in [1], where electroweak-scale right-handed Majorana neutrinos can easily accommodate both successful leptogenesis and observable signatures at Lepton Number and Flavour Violation experiments. The importance of the fully flavour-covariant rate equations, as developed in [1], for describing accurately the generation of the lepton asymmetry is reconfirmed.