Minimal flavor violation in the see-saw portal

Abstract

We consider an extension of the Standard Model with two singlet leptons, with masses in the electroweak range, that induce neutrino masses via the see-saw mechanism, plus a generic new physics sector at a higher scale, $\Lambda$. We apply the minimal flavor violation (MFV) principle to the corresponding Effective Field Theory ($\nu$SMEFT) valid at energy scales $E\ll \Lambda$. We identify the irreducible sources of lepton flavor and lepton number violation at the renormalizable level, and apply the MFV ansätz to derive the scaling of the Wilson coefficients of the $\nu$SMEFT operators up to dimension six. We highlight the most important phenomenological consequences of this hypothesis in the rates for exotic Higgs decays, the decay length of the heavy neutrinos, and their production modes at present and future colliders. We also comment on possible astrophysical implications.

arXiv comment28 pages, 3 Figures. References added, typos corrected. Added clarification on the contraction of the flavor indices. Matches the published version

References in corpus (35)

• Dimension-Six Terms in the Standard Model Lagrangian
• Minimal Flavour Violation: an effective field theory approach
• Oscillating neutrinos and mu --> e, gamma
• The $\nu$MSM, Dark Matter and Baryon Asymmetry of the Universe
• The Search for Heavy Majorana Neutrinos
• Baryogenesis via neutrino oscillations
• Right-Handed Neutrinos at LHC and the Mechanism of Neutrino Mass Generation
• Distinguishing seesaw models at LHC with multi-lepton signals
• Minimal Flavor Violation in the Lepton Sector
• Minimal Flavour Seesaw Models
• Standard and Non-Standard Plasma Neutrino Emission Revisited
• Do experiments suggest a hierarchy problem?
• Heavy Majorana Neutrinos in the Effective Lagrangian Description: Application to Hadron Colliders
• Operators up to Dimension Seven in Standard Model Effective Field Theory Extended with Sterile Neutrinos
• Heavy neutrino searches at the LHC with displaced vertices
• Testing sterile neutrino extensions of the Standard Model at future lepton colliders
• Right-handed neutrino magnetic moments
• Displaced vertex searches for sterile neutrinos at future lepton colliders
• Bounds on TeV Seesaw Models from LHC Higgs Data
• Various definitions of Minimal Flavour Violation for Leptons
• Indirect searches for sterile neutrinos at a high-luminosity Z-factory
• The seesaw portal in testable models of neutrino masses
• Can heavy neutrinos dominate neutrinoless double beta decay?
• Probing Baryogenesis with Displaced Vertices at the LHC
• Another Look at Minimal Lepton Flavour Violation, l_i -> l_j gamma, Leptogenesis, and the Ratio M_nu/ Lambda_LFV
• The $\mu \to e\gamma$ decay in a systematic effective field theory approach with dimension 6 operators
• Minimal flavour violation extensions of the seesaw
• Broadening the Higgs Boson with Right-Handed Neutrinos and a Higher Dimension Operator at the Electroweak Scale
• Higgs phenomenology as a probe of sterile neutrinos
• Probes of the Standard Model effective field theory extended with a right-handed neutrino
• The seesaw path to leptonic CP violation
• The Impact of Neutrino Magnetic Moments on the Evolution of Massive Stars
• Revisiting Minimal Lepton Flavour Violation in the Light of Leptonic CP Violation
• Majorana Neutrinos Production at NLC in an Effective Approach
• Majorana neutrino signals at Belle-II and ILC

Cited by in corpus (12)

• Long-lived Sterile Neutrinos at the LHC in Effective Field Theory
• Effective portals to heavy neutral leptons
• Heavy neutral leptons in effective field theory and the high-luminosity LHC
• The see-saw portal at future Higgs Factories
• Probing right-handed neutrinos dipole operators
• The see-saw portal at future Higgs factories: the role of dimension six operators
• Lepton collider probes for Majorana neutrino effective interactions
• Illuminating the dark: mono-$\gamma$ signals at NA62
• Angular and polarization observables for Majorana-mediated B decays with effective interactions
• Probing light sterile neutrinos in left-right symmetric models with displaced vertices and neutrinoless double beta decay
• Sensitivity prospects for lepton-trijet signals in the $\nu$SMEFT at the LHeC
• Representation of fermions in the Pati-Salam model