Reconciling resonant leptogenesis and baryogenesis via neutrino oscillations

Abstract

Right-handed neutrinos offer an elegant solution to two well established phenomena beyond the Standard Model (SM) - masses and oscillations of neutrinos, as well as the baryon asymmetry of the Universe. It is also a minimalistic solution since it requires only singlet Majorana fermions to be added to the SM particle content. If these fermions are nearly degenerate, the mass scale of right-handed neutrinos can be very low and accessible by the present and planned experiments. There are at least two well studied mechanisms of the low-scale leptogenesis: baryogenesis via oscillations and resonant leptogenesis. These two mechanisms were often considered separate, but they can in fact be understood as two different regimes of one and the same mechanism, described by a unique set of quantum kinetic equations. In this work we show, using a unified description based on quantum kinetic equations, that the parameter space of these two regimes of low-scale leptogenesis significantly overlap. We present a comprehensive study of the parameter space of the low-scale leptogenesis with the mass scale ranging from $0.1$ GeV to $\sim 10^6$ GeV. The unified perspective of this work reveals the synergy between intensity and energy frontiers in the quest for heavy Majorana neutrinos.

41 pages plus appendix, 12 figures

References in corpus (35)

• Leptogenesis
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Flavour Matters in Leptogenesis
• A possible symmetry of the $\nu$MSM
• Sterile Neutrinos as the Origin of Dark and Baryonic Matter
• The nuMSM, leptonic asymmetries, and properties of singlet fermions
• Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis
• Search for Majorana neutrinos in $B^{-}\to {\pi }^{+}{\mu }^{-}{\mu }^{-}$ decays
• The Search for Feebly-Interacting Particles
• Thermal production of relativistic Majorana neutrinos: Strong enhancement by multiple soft scattering
• Quantum Boltzmann Equations and Leptogenesis
• Baryon Asymmetry of the Universe in the NuMSM
• Lepton Flavour Violation and theta(13) in Minimal Resonant Leptogenesis
• Search for heavy neutrinos in $K^{+}\to {\mu }^{+}{\nu }_H$ decays
• Sterile neutrino searches via displaced vertices at LHCb
• Kadanoff-Baym Approach to Flavour Mixing and Oscillations in Resonant Leptogenesis
• Search for heavy neutral lepton production in $K^{+}$ decays
• Search for heavy neutral lepton production in $K^{+}$ decays to positrons
• Search for $K^{+}$ decays to a muon and invisible particles
• On Resonant Leptogenesis
• Right-handed neutrino production rate at T > 160 GeV
• The smallest neutrino mass
• Kubo relations and radiative corrections for lepton number washout
• Coherent quantum Boltzmann equations from cQPA
• Strong Washout Approximation to Resonant Leptogenesis
• Corrigendum to "Flavour Covariant Transport Equations: an Application to Resonant Leptogenesis"
• Sterile neutrino dark matter via GeV-scale leptogenesis?
• Resonant production of the sterile neutrino dark matter and fine-tunings in the [nu]MSM
• Freeze-out of baryon number in low-scale leptogenesis
• Coherent Flavour Oscillation and CP Violating Parameter in Thermal Resonant Leptogenesis
• Kinetic equations for sterile neutrinos from thermal fluctuations
• A thermal neutrino interaction rate at NLO
• Double Beta Decay APPEC Committee Report
• Two-loop renormalization group equations for right-handed neutrino masses and phenomenological implications
• Probing baryon asymmetry of the Universe at LHC and SHiP

Cited by in corpus (2)

• On the origin of matter in the Universe
• Leptogenesis in an anomaly-free $\mathrm{U}(1)$ extension with higher-dimensional operators