Tree-level Quartic for a Holographic Composite Higgs

TL;DR

This paper introduces a novel holographic composite Higgs model with a tree-level quartic coupling, reducing tuning and predicting new KK states and a two-doublet Higgs sector.

Contribution

It presents the first 5D warped space holographic composite Higgs model with a tree-level quartic, inspired by a 6D gauge field strength term, enhancing model flexibility.

Findings

Reduces Higgs potential tuning significantly.

Predicts doubling of KK states with small splittings.

Features a two-doublet Higgs sector in the decoupling limit.

Abstract

We present a new class of composite Higgs models where an adjustable tree-level Higgs quartic coupling allows for a significant reduction in the tuning of the Higgs potential. Our 5D warped space implementation is the first example of a holographic composite Higgs model with a tree-level quartic. It is inspired by a 6D model where the quartic originates from the Tr [A_5,A_6]^2 term of the gauge field strength, the same model that led to the original little Higgs construction of Arkani-Hamed, Cohen, and Georgi. Beyond the reduction of the tuning and the standard composite Higgs signatures, the model predicts a doubling of the KK states with relatively small splittings as well as a Higgs sector with two doublets in the decoupling limit.