Minimal lepton flavor violating realizations of minimal seesaw models

Abstract

We study the implications of the global U(1)R symmetry present in minimal lepton flavor violating implementations of the seesaw mechanism for neutrino masses. In the context of minimal type I seesaw scenarios with a slightly broken U(1)R, we show that, depending on the R-charge assignments, two classes of generic models can be identified. Models where the right-handed neutrino masses and the lepton number breaking scale are decoupled, and models where the parameters that slightly break the U(1)R induce a suppression in the light neutrino mass matrix. We show that within the first class of models, contributions of right-handed neutrinos to charged lepton flavor violating processes are severely suppressed. Within the second class of models we study the charged lepton flavor violating phenomenology in detail, focusing on mu to e gamma, mu to 3e and mu to e conversion in nuclei. We show that sizable contributions to these processes are naturally obtained for right-handed neutrino masses at the TeV scale. We then discuss the interplay with the effects of the right-handed neutrino interactions on primordial B - L asymmetries, finding that sizable right-handed neutrino contributions to charged lepton flavor violating processes are incompatible with the requirement of generating (or even preserving preexisting) B - L asymmetries consistent with the observed baryon asymmetry of the Universe.

21 pages, 4 figures; version 2: Discussion on possible generic models extended, typos corrected, references added. Version matches publication in JHEP

References in corpus (11)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Data Processing, Sky Maps, and Basic Results
• Low energy effects of neutrino masses
• Minimal Flavour Seesaw Models
• Where we are on ${\theta }_{13}$: addendum to "Global neutrino data and recent reactor fluxes: status of three-flavour oscillation parameters"
• Low Energy Signatures of the TeV Scale See-Saw Mechanism
• Various definitions of Minimal Flavour Violation for Leptons
• Minimal flavour violation extensions of the seesaw
• Flavor symmetries, leptogenesis and the absolute neutrino mass scale
• On the importance of the 1-loop finite corrections to seesaw neutrino masses
• Inverse tri-bimaximal type-III seesaw and lepton flavor violation
• Neutrino masses, leptogenesis and dark matter in hybrid seesaw

Cited by in corpus (17)

• A facility to Search for Hidden Particles at the CERN SPS: the SHiP physics case
• Muon conversion to electron in nuclei in type-I seesaw models
• Testing the low scale seesaw and leptogenesis
• An Extended Analysis of Heavy Neutral Leptons during Big Bang Nucleosynthesis
• Probing Leptogenesis at Future Colliders
• $R_{K^{(\ast )}}$ and related $b\to s\ell \bar{\ell }$ anomalies in minimal flavor violation framework with $Z^{\prime }$ boson
• Neutrinoless double $\beta$ decay and low scale leptogenesis
• On the Potential of Leptonic Minimal Flavour Violation
• Higgs Decay $h\to \mu \tau$ with Minimal Flavor Violation
• Minimal Lepton Flavor Violation Implications of the $b\to s$ Anomalies
• Dynamical flavor origin of ${\mathbb{Z}}_N$ symmetries
• Constraints on $Z^{\prime }$ Boson within Minimal Flavor Violation
• Seesaw Models with Minimal Flavor Violation
• Radiative neutrino mass model with degenerate right-handed neutrinos
• Light Majorana Neutrinos in (Semi)invisible Meson Decays
• Radiative accidental matter
• Lepton flavor violation and seesaw symmetries