The Orbifold Higgs

TL;DR

This paper introduces orbifold Higgs theories where accidental symmetries protect the Higgs mass from quadratic divergences without new charged states, unifying various models including the twin Higgs.

Contribution

It systematically develops orbifold Higgs models, showing their universal structure, UV completions, and compatibility with low scale unification, expanding beyond existing twin Higgs frameworks.

Findings

Quadratic sensitivity of Higgs mass is eliminated at one loop.

Models are derived from group theoretical principles and have geometric UV completions.

Framework includes the twin Higgs as a special case.

Abstract

We introduce and systematically study an expansive class of "orbifold Higgs" theories in which the weak scale is protected by accidental symmetries arising from the orbifold reduction of continuous symmetries. The protection mechanism eliminates quadratic sensitivity of the Higgs mass to higher scales at one loop (or more) and does not involve any new states charged under the Standard Model. The structures of the Higgs and top sectors are universal and determined exclusively by group theoretical considerations. The twin Higgs model fits within our framework as the simplest example of an orbifold Higgs. Our models admit UV completions as geometric orbifolds in higher dimensions, and fit naturally within frameworks of low scale gauge coupling unification.