Neutrino masses, leptogenesis and dark matter

Abstract

Despite the lack of evidence of new physics at colliders, neutrino masses, dark matter and matter-antimatter asymmetry of the universe require an extension of the Standard Model. After discussing some new concepts and tools in the description of seesaw neutrino models, such as motion in flavour lepton space and the introduction of the bridging matrix that nicely complements the orthogonal matrix, I discuss recent developments in the connections between neutrino data and scenarios of leptogenesis within some well motivated extensions of the Standard Model. Finally, I briefly review a simple unified picture of neutrino masses, leptogenesis and dark matter based on an extension of the seesaw Lagrangian where a non-renormalizable effective operator coupling right-handed neutrinos to the Higgs is introduced. This operator enhances the right-handed neutrino mixing between a coupled heavy right-handed neutrino and a decoupled one playing the role of dark matter. Interference between the two coupled RH neutrinos generate usual $CP$ violation so that one can also achieve successful leptogenesis. Although the dark matter right-handed neutrino escapes direct and collider searches, its decays produce a detectable contribution to the very high energy neutrino flux now discovered by IceCube, so that the model is predictive and can be tested at neutrino telescopes.

arXiv comment13 pages, 1 figure. Talk given at NuPhys2018; v2: Ref.'s added

References in corpus (25)

• Planck 2018 results. I. Overview and the cosmological legacy of Planck
• Oscillating neutrinos and mu --> e, gamma
• A lower bound on the right-handed neutrino mass from leptogenesis
• Neutrino masses and mixings in non-factorizable geometry
• Global analysis of three-flavour neutrino oscillations: synergies and tensions in the determination of theta_23, delta_CP, and the mass ordering
• Baryogenesis through leptogenesis
• Neutrino Masses from Large Extra Dimensions
• The Sphaleron Rate in the Minimal Standard Model
• Large Mixing Angle MSW and Atmospheric Neutrinos from Single Right-Handed Neutrino Dominance and U(1) Family Symmetry
• Neutrino Phenomenology -- the case of two right handed neutrinos
• Unified Models of Neutrinos, Flavour and CP Violation
• Leptogenesis with Dirac Neutrinos
• See-saw Enhancement of Lepton Mixing
• Flavoured leptogenesis: a successful thermal leptogenesis with N_1 mass below 10^8 GeV
• A4 See-Saw Models and Form Dominance
• Seesaw geometry and leptogenesis
• New aspects of leptogenesis bounds
• Leptogenesis in the two right-handed neutrino model revisited
• Successful type I Leptogenesis with SO(10)-inspired mass relations
• Tribimaximal Mixing, Leptogenesis, and theta13
• Unifying leptogenesis, dark matter and high-energy neutrinos with right-handed neutrino mixing via Higgs portal
• Cold Dark Matter from heavy Right-Handed neutrino mixing
• Decrypting $SO(10)$-inspired leptogenesis
• Successful $N_2$ leptogenesis with flavour coupling effects in realistic unified models
• SO(10)-inspired solution to the problem of the initial conditions in leptogenesis

Cited by in corpus (2)

• TeV Scale Resonant Leptogenesis with triplet Fermion in Connection to Muon $g-2$
• An Axion-Like Particle from an $SO(10)$ Seesaw with $U(1{)}_X$