# Gauge-Higgs Seesaw Mechanism in Six-Dimensional Grand Unification

## TL;DR

This paper presents a six-dimensional $SO(11)$ gauge-Higgs grand unification model that naturally generates small neutrino masses through a novel seesaw mechanism within the gauge-Higgs framework.

## Contribution

It introduces a new six-dimensional gauge-Higgs grand unification model with a unique seesaw mechanism for neutrino mass generation.

## Key findings

- Neutrino masses are naturally small due to the new seesaw mechanism.
- The model unifies electroweak and grand-unification dimensions in a six-dimensional space.
- Fermions are incorporated in specific representations of $SO(11)$.

## Abstract

$SO(11)$ gauge-Higgs grand unification is formulated in the six-dimensional hybrid warped space in which the fifth and sixth dimensions play as the electroweak and grand-unification dimensions. Fermions are introduced in ${\bf 32}$, ${\bf 11}$ and ${\bf 1}$ of $SO(11)$. Small neutrino masses naturally emerge as a result of a new seesaw mechanism in the gauge-Higgs unification which is characterized by a $3 \times 3$ mass matrix.