Phenomenology of the Little Higgs model with X-Parity

TL;DR

This paper introduces a realistic little Higgs model with X-Parity that remains unbroken by WZW terms, analyzing its properties, collider phenomenology, and LHC signatures of predicted light triplet scalars.

Contribution

It presents the first concrete construction of a little Higgs model with X-Parity unaffected by WZW terms, including detailed collider phenomenology and decay properties.

Findings

Model remains consistent with WZW symmetry protections.

Predicted light triplet scalars have distinctive LHC signatures.

Detailed analysis of decay properties and collider phenomenology.

Abstract

In the popular littlest Higgs model, T-parity can be broken by Wess-Zumino-Witten (WZW) terms induced by a strongly coupled UV completion. On the other hand, certain models with multiple scalar multiplets (called moose models) permit the implementation of an exchange symmetry (X-parity) such that it is not broken by the WZW terms. Here we present a concrete and realistic construction of such a model. The little Higgs model with X-Parity is a concrete and realistic implementation of this idea. In this contribution, the properties of the model are reviewed and the collider phenomenology is discussed in some detail. We also present new results on the decay properties and LHC signatures of the light triplet scalars that are predicted by this model.