Anarchic neutrinos from flavor deconstruction: phenomenology of the lepton sector

Abstract

We investigate the neutrino sector in the framework of flavor deconstruction with an inverse-seesaw realization. This setup naturally links the hierarchical charged-fermion masses to the anarchic pattern of light-neutrino mixing. We determine the viable parameter space consistent with oscillation data and study the phenomenology of heavy neutral leptons (HNL) and lepton-flavor-violating (LFV) processes. Current bounds from direct HNL searches and LFV decays constrain the right-handed neutrino scale to a few TeV, while future $\hat{I}¼\to e$ experiments will probe most of the region with $\hat{I}›\lesssim 10\text{TeV}$. Among possible realizations, models deconstructing $\mathrm{SU}(2{)}_{\mathrm{L}}\times \mathrm{U}(1{)}_{\mathrm{B}-\mathrm{L}}$ or $\mathrm{SU}(2{)}_{\mathrm{L}}\times \mathrm{U}(1{)}_{\mathrm{R}}\times \mathrm{U}(1{)}_{\mathrm{B}-\mathrm{L}}$ are those allowing the lowest deconstruction scale.

16 pages, 6 figures, 2 appendices