Effective neutrino mass operators: a guide to model building

Effective Neutrino Mass Operators: A Guide to Model Building

Effective operators relevant for generating small Majorana masses for the neutrinos in the Standard Model will be considered. These operators serve as a useful guide for building models of neutrino mass. Some of these operators are represented by familiar models in the literature, and others lead to interesting new models. The number of the relevant operators will be drastically reduced if neut...

Classification of Effective Neutrino Mass Operators

We present a classification of SU(3)C × SU(2)L × U(1)Y gauge invariant ∆L = 2 (L being lepton number) effective operators relevant for generating small Majorana neutrino masses. Operators of dimension up to 11 have been included in our analysis. This approach enables us to systematically identify interesting neutrino mass models. It is shown that many of the well–known models fall into this cla...

Minimalistic Neutrino Mass Model

We consider the simplest model which solves the solar and atmospheric neutrino puzzles, in the sense that it contains the smallest amount of beyond the Standard Model ingredients. The solar neutrino data is accounted for by Planck-mass effects while the atmospheric neutrino anomaly is due to the existence of a single righthanded neutrino at an intermediate mass scale between 109 GeV and 1014 Ge...

Strength in numbers: a guide to building effective Medicare advocacy coalitions.

An effective guide to beyond the Standard Model physics

Effective Lagrangians with dimension-six operators are widely used to analyse Higgs and other electroweak data. We show how to build a basis of operators such that each operator is linked to a coupling which is well measured or will be in the future. We choose a set of couplings such that the correspondence is one-to-one. The usual arbitrary coefficients in front of operators can be constrained...