Neutrino masses from operator mixing

Abstract

We show that in theories that reduce, at the Fermi scale, to an extension of the standard model with two doublets, there can be additional dimension five operators giving rise to neutrino masses. In particular there exists a singlet operator which can not generate neutrino masses at tree level but generates them through operator mixing. Under the assumption that only this operator appears at tree level we calculate the neutrino mass matrix. It has the Zee mass matrix structure and leads naturally to bimaximal mixing. However, the maximal mixing prediction for solar neutrinos is very sharp even when higher order corrections are considered. To allow for deviations from maximal mixing a fine tuning is needed in the neutrino mass matrix parameters. However, this fine tuning relates the departure from maximal mixing in solar neutrino oscillations with the neutrinoless double beta decay rate.

11 pages, 1 figure, revtex

References in corpus (5)

• Classification of Effective Neutrino Mass Operators
• Global Analysis of Solar Neutrino Oscillations Including SNO CC Measurement
• Model-dependent and independent implications of the first Sudbury Neutrino Observatory results
• The solar LMA neutrino oscillation solution in the Zee model
• Can the Zee Model Explain the Observed Neutrino Data?

Cited by in corpus (13)

• Models of Neutrino Masses and Mixings
• Right-handed neutrino magnetic moments
• Prospects for the Zee-Babu Model at the LHC and low energy experiments
• Models of Neutrino Masses: Anarchy versus Hierarchy
• From transition magnetic moments to majorana neutrino masses
• Discriminating between lepton number violating scalars using events with four and three charged leptons at the LHC
• Large mixing angles for neutrinos from infrared fixed points
• New supersymmetric source of neutrino masses and mixings
• Charge breaking bounds in the Zee model
• New Weinberg operator for neutrino mass and its seesaw origin
• Dark Matter in the Type Ib Seesaw Model
• Neutrino masses from new seesaw models: Low-scale variants and phenomenological implications
• Neutrino masses from new Weinberg-like operators: Phenomenology of TeV scalar multiplets