New development in radiative neutrino mass generation

Conference of Theoretical Physics and Nonlinear Phenomena 2014: "From Universe to String's Scale"

Julio^1

Fisika LIPI, Kompleks Puspiptek, Tangerang

15310, Indonesia^1

关键词: Branching ratio;    Expectation values;    Neutral Higgs bosons;    Neutrino mixing;    Neutrino oscillations;    Neutrinoless double-beta decays;    Phase parameters;    Predictive modeling;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/539/1/012013/pdf
DOI  :  10.1088/1742-6596/539/1/012013

来源: IOP

【 摘 要 】

We present a simple and predictive model of radiative neutrino masses. It is a special case of the Zee model with a family-dependent Z4symmetry acting on the leptons. A variety of predictions follow: The hierarchy of neutrino masses must be inverted; the lightest neutrino mass is extremely small and calculable; one of the neutrino mixing angles is determined in terms of the other two; the phase parameters take CP-conserving values with δCP= π; and the effective mass in neutrinoless double beta decay lies in a narrow range, mββ=(17.6-18.5) meV. The ratio of vacuum expectation values of the two Higgs doublets, tan β, is determined to be either 1.9 or 0.19 from neutrino oscillation data. Flavor-conserving and flavor-changing couplings of the Higgs doublets are also determined from neutrino data. The non-standard neutral Higgs bosons, if they are moderately heavy, decay significantly into μ and τ with prescribed branching ratios. Observable rates for the decays μ → eγ and τ → 3μ are predicted if these scalars have masses in the range of 150-500 GeV.