Neutrino mass from a hidden world and its phenomenological implications

TL;DR

This paper introduces a five-dimensional model where neutrino masses arise from lepton number violation on a distant brane, leading to suppressed neutrino masses and novel collider phenomenology.

Contribution

It presents a new extra-dimensional framework for neutrino mass generation with large Yukawa couplings and testable collider signatures.

Findings

Neutrino masses are exponentially suppressed by extra-dimensional effects.

The model allows large Yukawa couplings with singlet neutrinos.

Potential observable lepton number violation signals at the LHC.

Abstract

We propose a model of neutrino mass generation in extra dimension. Allowing a large lepton number violation on a distant brane spatially separated from the standard model brane, a small neutrino mass is naturally generated due to an exponential suppression of the messenger field in the 5D bulk. The model accommodates a large Yukawa coupling with the singlet neutrino (n_R) which may change the standard Higgs search and can simultaneously accommodate visible lepton number violation at the electroweak scale, which leads to very interesting phenomenology at the CERN Large Hadron Collider.