Flavour Covariant Formalism for Resonant Leptogenesis

PSB Dev, P Millington, A Pilaftsis, D Teresi

Research output: Contribution to journalArticlepeer-review

Abstract

We present a fully flavour-covariant formalism for transport phenomena and apply it to study the flavour-dynamics of Resonant Leptogenesis (RL). We show that this formalism provides a complete and unified description of RL, consistently accounting for three distinct physical phenomena: (i) resonant mixing and (ii) coherent oscillations between different heavy-neutrino flavours, as well as (iii) quantum decoherence effects in the charged-lepton sector. We describe the necessary emergence of higher-rank tensors in flavour space, arising from the unitarity cuts of partial self-energies. Finally, we illustrate the importance of this formalism within a minimal Resonant τ-Genesis model by showing that, with the inclusion of all flavour effects in a consistent way, the final lepton asymmetry can be enhanced by up to an order of magnitude, when compared to previous partially flavour-dependent treatments.
Original languageEnglish
Pages (from-to)268-274
Number of pages7
JournalNuclear and Particle Physics Proceedings
Volume273-275
DOIs
Publication statusPublished - 31 May 2016

Keywords

  • Discrete Symmetries
  • Flavour Covariance
  • Resonant Leptogenesis
  • Transport Equations

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