Neutrino hierarchy and fermion spectrum from a single family in six dimensions: realistic predictions
J.-M. Frere, M. Libanov, S. Mollet, S. Troitsky

TL;DR
This paper presents a six-dimensional flavor model predicting neutrino properties, including an inverted hierarchy and large mixing, with implications for neutrinoless double beta decay.
Contribution
It introduces a realistic 6-D model from a single fermion family that predicts neutrino mass hierarchy and mixing patterns, extending previous proof-of-concept work.
Findings
Predicts inverted neutrino mass hierarchy
Associates Majorana masses with large mixing angles
Suggests suppression of neutrinoless double beta decay
Abstract
In this paper, we move from a "proof of concept" to challenging predictions in a flavour model emerging from a single fermion family in six dimensions (6-D) with the two extra dimensions compactified on a sphere. The most striking predictions (beyond the basic ingredients already demonstrated for a realistic quark mass pattern) are for the neutrino sector. Not only can 4-D Majorana masses be generated from 6-D (where no Majorana spinors exist), but Majorana masses are naturally associated to large mixing. The model favours inverted hierarchy and a quasi-Dirac partial suppression of neutrinoless double beta decay.
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