Restricting CP violation in the low-scale type-I seesaw with three right-handed neutrinos to the Dirac phase δ alone yields specific testable subregions of heavy-neutrino flavor mixings and permits low-scale leptogenesis to generate the observed baryon asymmetry even for O(10^{-5}) deviations from C
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Oscillating neutrinos and mu --> e, gamma
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If neutrino masses and mixings are suitable to explain the atmospheric and solar neutrino fluxes, this amounts to contributions to FCNC processes, in particular mu --> e, gamma. If the theory is supersymmetric and the origin of the masses is a see-saw mechanism, we show that the prediction for BR(mu --> e, gamma) is in general larger than the experimental upper bound, especially if the largest Yukawa coupling is O(1) and the solar data are explained by a large angle MSW effect, which recent analyses suggest as the preferred scenario. Our analysis is bottom-up and completely general, i.e. it is based just on observable low-energy data. The work generalizes previous results of the literature, identifying the dominant contributions. Application of the results to scenarios with approximate top-neutrino unification, like SO(10) models, rules out most of them unless the leptonic Yukawa matrices satisfy very precise requirements. Other possible ways-out, like gauge mediated SUSY breaking, are also discussed.
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representative citing papers
Thermal Resonant Leptogenesis produces the observed baryon asymmetry via a dominant thermal channel from Higgs decays and lepton-doublet coherences, without requiring quasi-degenerate sterile neutrinos.
Flavor projection effects in density-matrix equations permit misaligned asymmetry components from N2 and N3 to survive N1 washout in hierarchical seesaw leptogenesis, dividing parameter space into four regimes under low-energy neutrino constraints.
Resonant thermal lepton-flavour coherences at two loops enable dominant low-scale leptogenesis for both Dirac and Majorana singlet neutrinos down to GeV masses without mass degeneracy.
A leptogenesis framework generates both baryon asymmetry and asymmetric dark matter via heavy Majorana neutrino decays, enabling a TeV-scale seesaw with hierarchical couplings and testable spin-independent DM cross sections above 10 GeV.
Minimal setup with one RHN and Higgs inflaton generates neutrino masses, baryon asymmetry via Affleck-Dine leptogenesis, and matches PLANCK/ACT inflation data with a small parameter space.
A scotogenic model variant predicts observable charged-lepton-flavor-violating decay rates and measurable T/P asymmetries at future experiments, with tau-to-3mu asymmetries offering a falsification handle.
Calculations of cLFV cross sections in eμ scattering show the e−μ+ → W+W− channel at √s > 2MW offers better prospects for detecting heavy sterile neutrinos than the quartically suppressed e−μ+ → e+μ− process.
The minimal majoron framework permits simultaneous majoron dark matter and thermal leptogenesis in a constrained cosmological window set by freeze-in production, warm dark matter bounds, and indirect detection limits.
Applies diffusion models to generate 10,000 neutrino mass matrices consistent with oscillation parameters in a seesaw model, revealing non-trivial distributions in CP phases and 0νββ effective mass.
Einstein-Cartan pseudoscalaron inflation coupled to type-I seesaw neutrinos makes nonthermal leptogenesis a necessary mechanism for the baryon asymmetry, yielding ns ~ 0.97, r ~ 0.004 and nB/s ~ 8.7e-11 for gamma ~ -1/100 and lightest Majorana mass ~ 10^13 GeV.
A minimal extension of the Standard Model with three heavy Majorana neutrinos simultaneously realizes fermionic dark matter, a strong first-order electroweak phase transition, and low-scale resonant leptogenesis consistent with neutrino data.
Triplet leptogenesis succeeds at TeV-scale masses in fast-expanding or scalar-tensor early universes, unlike the standard radiation-dominated case requiring 10^10 GeV.
In the minimal pseudo-Dirac HNL scenario, light-neutrino oscillation data fixes an ellipse in the active flavour simplex for leading active-heavy interactions via a single complex amplitude and Majorana phase.
Projects LHC and HL-LHC sensitivities to heavy neutrino mixing via dilepton channels in seesaw scenario, with dependence on R_ll and CP asymmetry.
PBH-assisted leptogenesis produces a multi-peaked GW spectrum in the MHz-EHz range from RHN graviton bremsstrahlung plus PBH-related sources.
Majoron dark matter is viable for sub-MeV masses in high-scale seesaw models with thermal leptogenesis, produced via misalignment and cosmic strings in pre- and post-inflationary scenarios and constrained by CMB, X-ray, and gravitational wave observations.
A multiverse cosmological selection mechanism in an SM extension with scalar singlet and RH neutrinos under B-L dynamically fixes the EW scale while addressing neutrino masses, leptogenesis, and dark matter.
Numerical scans in the minimal scotogenic model indicate that approximate neutrino texture structures emerge dynamically from dark matter and lepton flavor violation consistency conditions.
ULYSSES v3 extends an open-source Python toolkit to numerically solve leptogenesis equations in resonant low-scale and high-scale regimes with updated interfaces and cross-checks.
In the minimal Majoron model the particle can explain all dark matter with mass below about 10 MeV from misalignment or freeze-in, and remains compatible with thermal leptogenesis when misalignment dominates or with mild tuning.
In an E6-derived ψ'SM extension, a singlet fermion acts as freeze-in dark matter with relic density set by scalar decays for masses from a few MeV to hundreds of GeV, while type-I seesaw neutrinos simultaneously produce the observed baryon asymmetry via leptogenesis.
Singlet-doublet dark matter induces radiative neutrino masses at one loop while enabling TeV-scale leptogenesis in both Majorana and Dirac realizations.
The paper identifies promising parameter regions for observing same-sign tetralepton events from charged Higgs pair and single production decaying to muons and heavy neutral leptons at μTRISTAN.
citing papers explorer
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Dirac-Phase CP-Violation in the Low-Scale Type-I Seesaw with Three Right-Handed Neutrinos
Restricting CP violation in the low-scale type-I seesaw with three right-handed neutrinos to the Dirac phase δ alone yields specific testable subregions of heavy-neutrino flavor mixings and permits low-scale leptogenesis to generate the observed baryon asymmetry even for O(10^{-5}) deviations from C
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Dominant Thermal Resonant Mechanism for Low-Scale Leptogenesis
Thermal Resonant Leptogenesis produces the observed baryon asymmetry via a dominant thermal channel from Higgs decays and lepton-doublet coherences, without requiring quasi-degenerate sterile neutrinos.
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Does thermal leptogenesis in a canonical seesaw rely on initial memory?
Flavor projection effects in density-matrix equations permit misaligned asymmetry components from N2 and N3 to survive N1 washout in hierarchical seesaw leptogenesis, dividing parameter space into four regimes under low-energy neutrino constraints.
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Low-Scale Leptogenesis from Resonant Thermal Lepton Flavour Coherences
Resonant thermal lepton-flavour coherences at two loops enable dominant low-scale leptogenesis for both Dirac and Majorana singlet neutrinos down to GeV masses without mass degeneracy.
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Linking Leptogenesis and Asymmetric Dark Matter: A Testable Framework for Neutrino Mass and the Matter-Antimatter Asymmetry
A leptogenesis framework generates both baryon asymmetry and asymmetric dark matter via heavy Majorana neutrino decays, enabling a TeV-scale seesaw with hierarchical couplings and testable spin-independent DM cross sections above 10 GeV.
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Leptogenesis and neutrino mass with one right-handed neutrino and Higgs inflaton
Minimal setup with one RHN and Higgs inflaton generates neutrino masses, baryon asymmetry via Affleck-Dine leptogenesis, and matches PLANCK/ACT inflation data with a small parameter space.
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Revisiting cLFV in "T1-2-A" scotogenic models: asymmetries in three-body lepton decays
A scotogenic model variant predicts observable charged-lepton-flavor-violating decay rates and measurable T/P asymmetries at future experiments, with tau-to-3mu asymmetries offering a falsification handle.
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Electron-muon colliders at high energies to discover heavy sterile neutrinos
Calculations of cLFV cross sections in eμ scattering show the e−μ+ → W+W− channel at √s > 2MW offers better prospects for detecting heavy sterile neutrinos than the quartically suppressed e−μ+ → e+μ− process.
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The Majoron Cosmological Window: Dark Matter and Thermal Leptogenesis
The minimal majoron framework permits simultaneous majoron dark matter and thermal leptogenesis in a constrained cosmological window set by freeze-in production, warm dark matter bounds, and indirect detection limits.
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Exploring the flavor structure of leptons via diffusion models
Applies diffusion models to generate 10,000 neutrino mass matrices consistent with oscillation parameters in a seesaw model, revealing non-trivial distributions in CP phases and 0νββ effective mass.
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Einstein-Cartan pseudoscalaron inflation, reheating and nonthermal leptogenesis
Einstein-Cartan pseudoscalaron inflation coupled to type-I seesaw neutrinos makes nonthermal leptogenesis a necessary mechanism for the baryon asymmetry, yielding ns ~ 0.97, r ~ 0.004 and nB/s ~ 8.7e-11 for gamma ~ -1/100 and lightest Majorana mass ~ 10^13 GeV.
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Solving Cosmological Puzzles using Finite Temperature $\nu$SMEFT
A minimal extension of the Standard Model with three heavy Majorana neutrinos simultaneously realizes fermionic dark matter, a strong first-order electroweak phase transition, and low-scale resonant leptogenesis consistent with neutrino data.
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Towards Testable Type-III Leptogenesis in Non-Standard Early Universe Scenarios
Triplet leptogenesis succeeds at TeV-scale masses in fast-expanding or scalar-tensor early universes, unlike the standard radiation-dominated case requiring 10^10 GeV.
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Neutrino oscillation data and a pseudo-Dirac heavy neutral lepton
In the minimal pseudo-Dirac HNL scenario, light-neutrino oscillation data fixes an ellipse in the active flavour simplex for leading active-heavy interactions via a single complex amplitude and Majorana phase.
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Leptonic CP asymmetry and heavy neutrino searches in seesaw scenario
Projects LHC and HL-LHC sensitivities to heavy neutrino mixing via dilepton channels in seesaw scenario, with dependence on R_ll and CP asymmetry.
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Multi-peaked high-frequency gravitational waves from PBH-assisted leptogenesis
PBH-assisted leptogenesis produces a multi-peaked GW spectrum in the MHz-EHz range from RHN graviton bremsstrahlung plus PBH-related sources.
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Majoron Dark Matter, High-Scale Seesaw, and Leptogenesis
Majoron dark matter is viable for sub-MeV masses in high-scale seesaw models with thermal leptogenesis, produced via misalignment and cosmic strings in pre- and post-inflationary scenarios and constrained by CMB, X-ray, and gravitational wave observations.
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Linking the Gauge Hierarchy with Neutrino Masses and Dark Matter via Two-step Cosmological Selection
A multiverse cosmological selection mechanism in an SM extension with scalar singlet and RH neutrinos under B-L dynamically fixes the EW scale while addressing neutrino masses, leptogenesis, and dark matter.
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Emergent Neutrino Texture Geometry from Dark Matter and Lepton Flavor Violation in the Scotogenic Model
Numerical scans in the minimal scotogenic model indicate that approximate neutrino texture structures emerge dynamically from dark matter and lepton flavor violation consistency conditions.
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ULYSSES the Third: An Odyssey Towards a Unified Python Toolkit for Leptogenesis
ULYSSES v3 extends an open-source Python toolkit to numerically solve leptogenesis equations in resonant low-scale and high-scale regimes with updated interfaces and cross-checks.
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Minimal Majoron Dark Matter
In the minimal Majoron model the particle can explain all dark matter with mass below about 10 MeV from misalignment or freeze-in, and remains compatible with thermal leptogenesis when misalignment dominates or with mild tuning.
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Freeze-In Dark Matter and Leptogenesis: a $\psi'$SM route
In an E6-derived ψ'SM extension, a singlet fermion acts as freeze-in dark matter with relic density set by scalar decays for masses from a few MeV to hundreds of GeV, while type-I seesaw neutrinos simultaneously produce the observed baryon asymmetry via leptogenesis.
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Singlet-doublet dark matter induced radiative neutrino mass and TeV scale leptogenesis
Singlet-doublet dark matter induces radiative neutrino masses at one loop while enabling TeV-scale leptogenesis in both Majorana and Dirac realizations.
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Same-Sign Tetralepton Signature at $\mu$TRISTAN
The paper identifies promising parameter regions for observing same-sign tetralepton events from charged Higgs pair and single production decaying to muons and heavy neutral leptons at μTRISTAN.
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Mono-Z' Signatures in the B-L Supersymmetric Standard Model at the LHC
Mono-Z' events from Z' plus singlet Higgs production in the BLSSM-IS, with h' decaying to LSP dark matter pairs, yield a detectable leptonic signal independent of the specific DM candidate.
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Resonant Leptogenesis in a Two-Triplet Type-II Seesaw: A Dynamical Origin of Suppressed Lepton Flavor Violation
In a two-triplet Type-II seesaw, resonant leptogenesis at the TeV scale dynamically requires small Yukawa couplings that suppress observable lepton flavor violation as a direct consequence of successful baryogenesis.
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Induced Multi-phase Inflation with Reheating: Leptogenesis and Dark Matter Production in Metric versus Palatini
Multi-phase non-minimal inflation in metric and Palatini gravity predicts ns between 0.93 and 0.98, r up to 0.03 in metric but below 10^{-5} in Palatini, with non-thermal DM and leptogenesis viable for couplings in the 10^{-7} to 10^{-3} range.
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Light neutrinos, Dark matter and leptogenesis near electroweak scale and $Z_4$ symmetry
Z4-symmetric Type I seesaw fits neutrino data with minimal parameters and enables freeze-in dark matter plus resonant leptogenesis via soft symmetry breaking.
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Global analysis of a minimally extended scotogenic model
Global analysis constrains fermionic DM to 120-350 GeV and CP-odd scalar to 350-600 GeV in a scotogenic extension, with DESI potentially ruling out inverted neutrino hierarchy and Z invisible width compatible with data at 3 sigma.
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Revisiting lepton flavor violation: $\tau$ and meson decays
Updated type-I seesaw analysis shows semileptonic tau decays like tau to lepton rho can dominate cLFV signals and some branching ratios may reach next-generation experiment sensitivity.
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$SO(10)$-inspired leptogenesis
SO(10)-inspired leptogenesis implies N2-leptogenesis, ruling out inverted neutrino ordering under strict conditions and enabling initial-condition-independent asymmetry in subsets of solutions.