Higgs for Graviton: Simple and Elegant Solution

TL;DR

This paper proposes a Higgs mechanism for gravity using four scalars, resulting in a massive graviton that is unitary and ghost-free, offering a simple and elegant solution to graviton mass generation.

Contribution

It introduces a novel Higgs mechanism for gravity with four scalars, leading to a consistent massive graviton theory.

Findings

Graviton absorbs scalars and becomes massive spin 2 particle

The theory is shown to be unitary and ghost-free

Provides a simple, elegant solution for graviton mass generation

Abstract

A Higgs mechanism for gravity is presented, where four scalars with global Lorentz symmetry are employed. We show that in the broken symmetry phase a graviton absorbs all scalars and become massive spin 2 particle with five degrees of freedom. The resulting theory is unitary and free of ghosts.