Natural Dirac Neutrinos from Warped Extra Dimension

TL;DR

This paper proposes a model where Dirac neutrinos are generated via gauged discrete symmetry in a Randall-Sundrum framework, naturally reproducing lepton masses and mixing, including a nonzero θ13, with testable predictions at the LHC.

Contribution

It introduces a minimal custodial Randall-Sundrum model implementing Dirac neutrinos through gauged discrete symmetry, aligning with experimental constraints and predicting observable Kaluza-Klein neutrinos.

Findings

Reproduces lepton masses and mixing patterns naturally.

Predicts sub-TeV right-handed Kaluza-Klein neutrinos.

Includes a nonzero neutrino mixing angle θ13.

Abstract

Dirac neutrinos arising from gauged discrete symmetry \`a la Krauss-Wilczek are implemented in the minimal custodial Randall-Sundrum model. In the case of a normal hierarchy, all lepton masses and mixing pattern can be naturally reproduced at the TeV scale set by the electroweak constraints, while simultanously satisfy bounds from lepton flavour violation. A nonzero neutrino mixing angle, $\theta_{13}$, is generic in the scenario, as well as the existence of sub-TeV right-handed Kaluza-Klein neutrinos, which may be searched for at the LHC.