A lower bound on the right-handed neutrino mass from leptogenesis

Abstract

In the seesaw model, the baryon asymmetry of the Universe can be generated by the decay of the lightest right-handed neutrino, nu_R. For a hierarchical spectrum of right-handed neutrinos, we show that there is a model independent upper bound on the CP asymmetry produced in these decays: epsilon < 3 m_{nu_3} M_{nu_R}/(8 pi <H_u>^2). This implies that epsilon and the mass M_{nu_R} of the lightest right-handed neutrino are not independent parameters, as is commonly assumed. If m_{nu_3} = sqrt{Delta m^2_{atm}} and the nu_R are produced thermally, then leptogenesis requires a reheat temperature of the Universe T_{reh} > M_{nu_R} > 10^8 GeV. Reasonable estimates of nu_R production and the subsequent washout of the asymmetry, as made by Buchmuller and Plumacher, imply M_{nu_R} > 10^9 GeV, and T_{reh} > 10^{10} GeV. Implications for the gravitino problem are also discussed.

9 pages. References added. Version to appear in Phys. Lett. B

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• CMB imprints of high scale non-thermal leptogenesis
• Annihilating Leptogenesis
• Fermion masses, Leptogenesis and Supersymmetric SO(10) Unification
• Introduction to leptogenesis
• Gravitino dark matter production at finite temperature
• An SO(10) \times SO(10)' model for common origin of neutrino masses, ordinary and dark matter-antimatter asymmetries
• Low-scale Resonant Leptogenesis in $SU(5)$ GUT with ${\mathcal{T}}_{13}$ Family Symmetry
• Nonthermal $CP$ violation in soft leptogenesis
• Confronting Four Zero Neutrino Yukawa Textures with $N_2^{}$-dominated Leptogenesis
• Renormalization group evolution induced leptogenesis in the minimal seesaw model with the trimaximal mixing and mu-tau reflection symmetry
• Pati-Salam unification with a spontaneous CP violation
• Froggatt-Nielsen models with a residual Z_4^R symmetry
• Thermal leptogenesis, dark matter, and gravitational waves from an extended canonical seesaw scenario
• Low-scale leptogenesis with flavour and CP symmetries
• Gravitino Thermal Production, Dark Matter, and Reheating of the Universe
• Asymmetric long-lived dark matter and leptogenesis from type-III seesaw framework
• Cosmologically viable gauge mediation
• Primordial non-Gaussianity as a probe of seesaw and leptogenesis
• Neutrino Masses, Baryon Asymmetry, Dark Matter and the Moduli Problem : A Complete Framework
• Leptogenesis in $\Delta (27)$ with a Universal Texture Zero
• The long-lived stau as a thermal relic
• Dynamical Matter-Parity Breaking and Gravitino Dark Matter
• Tree level Majorana neutrino mass from Type-1 $\times$ Type-2 Seesaw mechanism with Dark Matter
• Baryogenesis via leptogenesis from quark-lepton symmetry\par and a compact heavy $N_R$ spectrum
• PeV-scale leptogenesis, gravity waves and black holes from a SUSY-breaking phase transition
• Probing the Nature of Heavy Neutral Leptons in Direct Searches and Neutrinoless Double Beta Decay
• Probing Supersymmetric Leptogenesis with mu --> e gamma
• Baryogenesis and Dark Matter in Multiple Hidden Sectors
• Purely Triplet Seesaw and Leptogenesis within Cosmological Bound, Dark Matter and Vacuum Stability
• Spontaneous mirror left-right symmetry breaking for leptogenesis parametrized by Majorana neutrino mass matrix
• Neutrino mass generation and leptogenesis via pseudo-Nambu-Goldstone Higgs portal
• The reheating era leptogenesis in models with seesaw mechanism
• Gravitational Waves from Metastable Cosmic Strings in Supersymmetric New Inflation Model
• Updating GUT-Scale Pole Higgs Inflation After ACT DR6
• Type-II seesaw mass models and baryon asymmetry
• Supermassive gravitinos, dark matter, leptogenesis and flat direction baryogenesis
• Lepton flavor violations in SUSY models for muon $g-2$ with right-handed neutrinos
• Perturbativity in the seesaw mechanism
• Simiplified textures of the seesaw model for the trimaximal neutrino mixings
• Resonant leptogenesis with mild degeneracy
• Testing quasi-Dirac leptogenesis through neutrino oscillations
• Pathways to testable leptogenesis
• Low energy implications of cosmological data in $U(1{)}_X$ Higgs inflation
• Mild-split SUSY with flavor
• Pure Gravity Mediation and Spontaneous B-L Breaking from Strong Dynamics
• Dark sector production and baryogenesis from not quite black holes
• Low-Energy Thermal Leptogenesis in an Extended NMSSM Model
• Possible roles of Peccei-Quinn symmetry in an effective low energy model
• Anomalous Cyclic in the Neutrino Oscillations
• Reviewing the prospect of fermion triplets as dark matter and source of baryon asymmetry in non-standard cosmology
• Neutrino texture saturating the CP asymmetry
• Seminatural Gauge Mediation from Product Group Unification
• Thermal leptogenesis in anisotropic cosmology
• Confronting the low-scale seesaw and leptogenesis with neutrinoless double beta decay
• Hidden-Sector Neutrinos and Freeze-In Leptogenesis
• Leptogenesis and Bi-Unitary Parametrization of Neutrino Yukawa Matrix
• Thermal leptogenesis in nonextensive cosmology
• Leptogenesis and Dark Matter-Nucleon Scattering Cross Section in the SE6SSM
• Leptogenesis after superconformal subcritical hybrid inflation
• Common origin of inverse seesaw and baryon asymmetry
• Double type-II Dirac seesaw accompanied by Dirac fermionic dark matter
• Type-I thermal leptogenesis in $Z_3$-symmetric three Higgs doublet model
• Soft leptogenesis in the NMSSM with a singlet right-handed neutrino superfield
• Diagonal reflection symmetries and universal four-zero texture
• Leptogenesis: Theory and Neutrino Masses
• Neutrino Masses and Leptogenesis from Extra Fermions
• Texture Zero Neutrino Models and Their Connection with Resonant Leptogenesis
• Thermal keV dark matter in a gauged B-L model with cosmic inflation
• Leptogenesis and eV scale sterile neutrino
• Asymmetries in Extended Dark Sectors: A Cogenesis Scenario
• Inflation and Higgs Phenomenology in a Model Unifying the DFSZ Axion with the Majoron
• Baryogenesis via Leptogenesis in presence of cosmic strings
• Accurate renormalization group analyses in neutrino sector
• Insights on the Cosmic Origin of Matter from Proton Stability
• Dark matter as the source of neutrino mass: theory overview and experimental prospects
• Gauge mediated supersymmetry breaking and the cosmology of Left-Right symmetric model
• Neutrino helicity asymmetries in leptogenesis
• Unification Predictions With or Without Supersymmetry
• Calculable Cosmological CP Violation and Resonant Leptogenesis
• From Peccei Quinn symmetry to mass hierarchy problem
• Phenomenology of Baryogenesis from Lepton-Doublet Mixing
• Low-scale Leptogenesis with Minimal Lepton Flavour Violation
• Low scale leptogenesis under neutrino $\mu$-$\tau$ reflection symmetry
• Minimal Leptogenesis in Brane-inspired Cosmology
• Scalar dark matter, Neutrino mass and Leptogenesis in a $\mathrm{U}(1{)}_{\mathrm{B}-\mathrm{L}}$ model
• A New Era of Leptogenesis
• The Thermal Feedback Effects on the Temperature Evolution during Reheating
• Leptogenesis in GeV scale seesaw models
• Minimal inverse seesaw accompanied by Dirac fermionic dark matter
• No-scale Brans-Dicke Gravity -- ultralight scalar boson & heavy inflaton
• Big-bang nucleosynthesis and Leptogenesis in CMSSM
• Suppressing gravitino thermal production with a temperature-dependent messenger coupling
• Wash-Out in N_2-dominated leptogenesis
• Leptogenesis, Dark Matter and Higgs Phenomenology at TeV
• Low scale leptogenesis in a model with promising $CP$ structure
• Electroweak baryogenesis in the three-loop neutrino mass model with dark matter
• Flavorful hybrid anomaly-gravity mediation
• Higgs Boson Exempt No-Scale Supersymmetry with a Neutrino Seesaw: Implications for Lepton Flavor Violation and Leptogenesis
• Neutrino phenomenology and keV dark matter in 2HDM with $A_4$ symmetry
• Implications of an additional scale on leptogenesis
• Neutrino Mass Matrices from Two Zero 3x2 Yukawa Textures and Minimal d=5 Entries
• Low-scale seesaw from neutrino condensation
• $U(1{)}_{Y^{\prime }}$ universal seesaw
• Protecting the primordial baryon asymmetry in the seesaw model compatible with WMAP and KamLAND
• Gravitational Wave Spectral Shapes as a probe of Long Lived Right-handed Neutrinos, Leptogenesis and Dark Matter: Global versus Local B-L Cosmic Strings
• Freed Leptogenesis
• Dark matter and low scale leptogenesis in a flavor symmetric neutrino two Higgs doublet model($\nu$2HDM)
• Non-thermal leptogenesis and gravitino problem in inflaton decay
• Reconciling resonant leptogenesis and baryogenesis via neutrino oscillations
• Flavoured CP-asymmetry at the effective neutrino mass floor
• A common framework for fermion mass hierarchy, leptogenesis and dark matter
• Hot Leptogenesis
• B-L-symmetric Baryogenesis with Leptonic Quintessence
• A new leptogenesis scenario parametrized by Dirac neutrino mass matrix
• A lower bound on the right-handed neutrino mass from wash-in leptogenesis
• Insights on the Scale of Leptogenesis from Neutrino Masses and Neutrinoless Double-Beta Decay
• Neutrino masses, leptogenesis and dark matter
• Constraint on $B-L$ cosmic string from leptogenesis with degenerate neutrinos
• Neutrino Mass, Dark Matter, and Leptogenesis
• Leptogenesis in automatic Nelson-Barr models
• Mini-review on baryogenesis at the TeV scale and possible connections with dark matter
• Connecting dark matter, baryogenesis and neutrinoless double beta decay in a $A_4\otimes Z_8$ based $\nu$2HDM
• A split seesaw model with hidden neutrinoless double beta decay but successful leptogenesis
• Sterile neutrino rates for general $M$, $T$, $\mu$, $k$: review of a theoretical framework
• Post-inflationary Leptogenesis and Dark Matter production: Metric versus Palatini formalism
• Low-scale leptogenesis and dark matter in a three-loop radiative seesaw model
• Phenomenology of one zero texture Yukawa matrix in a flavor symmetric scotogenic model
• Light sterile neutrino and leptogenesis
• Genesis of baryon and dark matter asymmetries through ultraviolet scattering freeze-in
• Leptogenesis with dynamical couplings
• Two-component Dark Matter and low scale Thermal Leptogenesis
• Decaying scalar dark matter in the minimal left-right symmetric model
• Leptogenesis from a feebly interacting dark matter sector
• Connecting low-energy CP violation, resonant leptogenesis and neutrinoless double beta decay in a radiative seesaw model
• Leptogenesis implications in models with Abelian family symmetry and one extra real Higgs singlet
• Testable Flavored TeV-scale Resonant Leptogenesis with MeV-GeV Dark Matter in a Neutrinophilic 2HDM
• Linear seesaw leptogenesis before/after electroweak symmetry breaking
• The Neutrino Mass Bound from Leptogenesis Revisited
• The Dark Side of ${\theta }_{13}$, ${\delta }_{CP}$, Leptogenesis and Inflation in Type-I Seesaw
• Supersymmetric Lepton Flavor Violation and Leptogenesis
• Quasiparticles in Leptogenesis - A hard-thermal-loop study
• Leptogenesis via Varying Weinberg Operator: the Closed-Time-Path Approach
• Constraining Affleck-Dine Leptogenesis after Thermal Inflation
• Parametrized leptogenesis from linear seesaw
• Dark Matter and Torsion
• Baryogenesis via relativistic bubble expansion
• Naturalness in Soft Leptogenesis and Gravitino Mass Bound due to Primordial Black Holes
• Leptogenesis: a Link between the Matter-Antimatter Asymmetry and Neutrino Physics
• Leptogenesis assisted by scalar decays
• Spontaneous CP violation, sterile neutrino dark matter, and leptogenesis
• Probing leptogenesis and the minimal neutrino seesaw mechanism through gravitational waves
• Does thermal leptogenesis in a canonical seesaw rely on initial memory?
• Rescuing leptogenesis in inverse seesaw models with the help of non-Abelian flavor symmetries
• Low scale leptogenesis and $T{M}_1$ mixing in neutrinophillic two Higgs doublet model($\nu$2HDM) with S4 flavor symmetry
• Gravitational Wave Production and Baryogenesis in a Simple Left-Right model
• Probing low scale leptogenesis through gravitational wave
• Neutrino masses, matter-antimatter asymmetry, dark matter, and supermassive black hole formation explained with Majorons
• Unified Origin of Dirac Neutrino and Asymmetric Dark Matter Masses via a Dirac-Type Leptogenesis
• WIMP Dark Matter from a Natural Discrete Gauge Symmetry in the Standard Model
• Standard and Non-Standard Aspects of Neutrino Physics
• Leptogenesis in the $\mu \tau$ basis
• A realistic pattern of fermion masses from a five-dimensional SO(10) model
• The Nature of Massive Neutrinos
• Low Scale Leptogenesis from Non-Leptonic CP-Phases
• Neutrino Oscillations Due to Nonuniversal Gauge Interactions in the Weak Sector
• Non-resonant leptogenesis in seesaw models with an almost conserved B-L
• Quark mass matrices inspired by a numerical relation
• Leptogenesis in the littlest inverse seesaw model
• Lopsided texture compatible with thermal leptogenesis in partially composite Pati--Salam unification
• Feasibility Study of Lepton Number Violation in Rare $B$ and $K$ Meson Decays
• Cosmic Collider Gravitational Waves sourced by Right-handed Neutrino production from Bubbles: Testing Seesaw, Leptogenesis and Dark Matter
• Dark Matter-Driven Low-Scale Leptogenesis via Neutrino Portal
• Probing quark-lepton correlation in GUTs with high-precision neutrino measurements
• Leptonic CP Violation and Baryon Asymmetry
• Impact of dim-6 $\nu$SMEFT operators on low-scale leptogenesis
• Bounds on neutrino masses from baryogenesis in thermal and non-thermal scenarios
• Leptogenesis and neutrino mass with one right-handed neutrino and Higgs inflaton
• Freeze-In Dark Matter and Leptogenesis: a ${\psi }^{\prime }$SM route
• Low scale leptogenesis with an SU(2)_L singlet scalar
• Exact parametrization of a minimal seesaw model
• Leptogenesis with perturbations in type-II and type-III seesaw models
• A singlet scalar assisted $N_2$ Leptogenesis and Pseudo-Scalar Dark Matter
• Gauge dilution in leptogenesis
• Thermal leptogenesis in the presence of helical hypermagnetic fields
• Do we understand the internal spaces of second quantized fermion and boson fields, with gravity included? Relation with strings theories
• Chiral perturbative relation for neutrino masses in the type-I seesaw mechanism
• Completing RHINO
• Hybrid anomaly-gravity mediation with flavor
• Neutrino phenomenology from leptogenesis
• Developments in Leptogenesis
• Leptoquarks with Exactly Stable Protons
• Probing Leptogenesis and Pre-BBN Universe with Gravitational Waves Spectral Shapes
• Resonant leptogenesis and TM${}_1$ mixing in minimal Type-I seesaw model with S${}_4$ symmetry
• Dilution of axion dark radiation by thermal inflation
• How to avoid unnatural hierarchical thermal leptogenesis
• Gravitational wave complementarity and impact of NANOGrav data on gravitational leptogenesis: cosmic strings
• Leptogenesis from a $U(1{)}_D$ resonance
• Testing the Leptogenesis Mechanism of the Seesaw Model
• Implications of Rare Kaon Decays on Lepton Number Violating Interactions
• Proceedings to the 27th Workshop "What Comes Beyond the Standard Models" Bled, July 8-17, 2024