A Holographic Twin Higgs Model

TL;DR

This paper develops a holographic composite Higgs model implementing the twin Higgs mechanism, naturally suppressing the Higgs potential contributions and predicting new physics beyond LHC reach, testable at future colliders.

Contribution

It provides a UV-complete holographic realization of the twin Higgs model with specific symmetry breaking and Z2 breaking mechanisms, addressing naturalness and experimental testability.

Findings

Higgs potential effectively cut off by mirror partners at scale f

Model predicts KK excitations beyond LHC reach

Future colliders can probe the model via precision Higgs measurements

Abstract

We present a UV completion of the twin Higgs idea in the framework of holographic composite Higgs. The SM contribution to the Higgs potential is effectively cut off by the SM-singlet mirror partners at the sigma-model scale f, naturally allowing for m_{KK} beyond the LHC reach. The bulk symmetry is SU(7) X SO(8), broken on the IR brane into SU(7) X SO(7) and on the UV brane into (SU(3) X SU(2) X U(1))^{SM} X (SU(3) X SU(2) X U(1))^{mirror} X Z2. The field content on the UV brane is the SM, extended by a sector transforming under the mirror gauge group, with the Z2 exchanging the two sectors. An additional Z2 breaking term is holographically generated to reproduce the Higgs mass and VEV, with a mild O(10%) tuning. This model has no trace at the LHC, but can by probed by precision Higgs measurements at future lepton colliders, and by direct searches for KK excitations at a 100 TeV collider.