Exotic Top Partners and Little Higgs

TL;DR

This paper explores the existence and phenomenology of exotic top partners in Little Higgs models, highlighting new decay channels involving pseudo-Nambu-Goldstone bosons and proposing novel LHC search strategies.

Contribution

It introduces a new Little Higgs model based on an SO(10)/SO(5)^2 coset, expanding the theoretical landscape and suggesting new experimental signatures.

Findings

Exotic top partners can decay into new pseudo-Nambu-Goldstone bosons.

Cascade decays of top partners may reveal these new bosons at the LHC.

Proposes search strategies involving b-jets and multiple electroweak bosons.

Abstract

Little Higgs models often give rise to top partners beyond the minimal ones necessary for the cancellation of quadratic divergences. We review how this occurs and discuss the phenomenology of these exotic states. We emphasize the possible importance of new pseudo-Nambu-Goldstone bosons in top partner decays. Indeed, cascade decays of exotic top partners may be the best way to discover these new bosons. We illustrate these points with a new Little Higgs construction based on an SO(10)/SO(5)^2 coset structure, which fills a gap in the model building literature. These observations motivate new search strategies for top partners at the LHC, including for final states with b-jets and a large multiplicity of electroweak bosons.