Leptogenesis: beyond the minimal type I seesaw scenario

Abstract

Numerous recent evidences for neutrino masses have established the leptogenesis mechanism as a very natural possible explanation for the baryon asymmetry of the Universe. The explicit realization of this mechanism depends on the neutrino mass model considered. If the right-handed type-I seesaw model of neutrino masses is certainly the most straightforward, it is not the only natural one, especially in the framework of explicit GUT realizations of the seesaw. In this review we discuss in detail the various seesaw scenarios that can implement the leptogenesis mechanism successfully, beyond the paradigm of the pure standard type-I seesaw model. This includes scenarios based on the existence of scalar triplets (type-II), of fermion triplets (type-III) as well as mixed seesaw frameworks.

42 pages, 13 figures, invited review chapter for the "Focus on the Origin of Matter" issue published in the New Journal of Physics (It is likely that non-seesaw leptogenesis scenarios will be also discussed in this review in a subsequent arXiv version)

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• The minimal scenario of leptogenesis
• Renormalization group running of neutrino parameters
• LHC bounds on Lepton Number Violation mediated by doubly and singly-charged scalars
• Scalar triplet flavored leptogenesis: a systematic approach
• SO(10)-inspired solution to the problem of the initial conditions in leptogenesis
• Leptogenesis with a dynamical seesaw scale
• Leptogenesis in fast expanding Universe
• Spontaneous CP Violation in Lepton-sector: a common origin for ${\theta }_{13}$, Dirac CP phase and leptogenesis
• A cosmological pathway to testable leptogenesis
• Effective Operator Bases for Beyond Standard Model Scenarios: An EFT compendium for discoveries
• Flavoured CP asymmetries for type II seesaw leptogenesis
• TeV scale seesaw from supersymmetric Higgs-lepton inflation and BICEP2
• Explaining The CDF-II W-Boson Mass Anomaly in the Georgi-Machacek Extension Models
• Asymmetric self-interacting dark matter with a canonical seesaw model
• Type III seesaw under $A_4$ modular symmetry with leptogenesis
• Testing Dirac leptogenesis with the cosmic microwave background and proton decay
• Triplet Leptogenesis, Type-II Seesaw Dominance, Intrinsic Dark Matter, Vacuum Stability and Proton Decay in Minimal SO(10) Breakings
• Resonant leptogenesis in (2,2) inverse see-saw realisation
• Scalar Triplet Flavor Leptogenesis with Dark Matter
• Lowering the scale of fermion triplet leptogenesis with two Higgs doublets
• Searches for heavy neutrinos at multi-TeV muon collider : a resonant leptogenesis perspective
• Scalar-singlet assisted leptogenesis with CP violation from the vacuum
• Leptogenesis and low-energy CP violation in a type-II-dominated left-right seesaw model
• Neutrino masses from new seesaw models: Low-scale variants and phenomenological implications
• Complete One-loop Structure of the Type-(I+II) Seesaw Effective Field Theory
• Asymmetric long-lived dark matter and leptogenesis from type-III seesaw framework
• Purely Triplet Seesaw and Leptogenesis within Cosmological Bound, Dark Matter and Vacuum Stability
• Reviewing the prospect of fermion triplets as dark matter and source of baryon asymmetry in non-standard cosmology
• Broken $S_{3\mathrm{L}}^{}\times S_{3\mathrm{R}}^{}$ Flavor Symmetry and Leptonic CP Violation
• Asymmetries in Extended Dark Sectors: A Cogenesis Scenario
• Scalar triplet leptogenesis in the presence of right-handed neutrinos with S3 symmetry
• Neutrino mass, leptogenesis and sterile neutrino dark matter in inverse seesaw framework
• Revisiting the role of CP-conserving processes in cosmological particle-antiparticle asymmetries
• Leptogenesis from low-energy CP violation in minimal left-right symmetric model
• Minimal Leptogenesis in Brane-inspired Cosmology
• Flavor symmetric origin of texture zeros in minimal inverse seesaw and impacts on leptogenesis
• SU(5) unification of two triplet seesaw and leptogenesis with dark matter and vacuum stability
• Sphaleron in the Higgs Triplet Model
• Seesaw Models under the Lens of Angular Distributions at ${\mu }^{+}{\mu }^{-},{\mu }^{+}{\mu }^{+},{\mu }^{+}\gamma$ and ${\mu }^{+}{e}^{-}$ Colliders
• Scalar triplet leptogenesis without right-handed neutrino decoupling
• Triplet scalar flavored leptogenesis with spontaneous CP violation
• Baryogenesis via relativistic bubble expansion
• Origin of neutrino masses, dark matter, leptogenesis, and inflation in a seesaw model with triplets
• Standard and Non-Standard Aspects of Neutrino Physics
• Status and Perspectives of Neutrino Physics
• Leptogenesis with perturbations in type-II and type-III seesaw models