Testing LHT at the LHC Run-II

TL;DR

This paper investigates the potential to detect the Littlest Higgs model with T-parity at the 14 TeV LHC using W-jet tagging, proposing a new method to measure key model parameters and demonstrate the model's testability.

Contribution

It introduces a novel strategy for measuring the principal parameter f of the LHT model and demonstrates the feasibility of probing the model with current experimental techniques.

Findings

Model parameter space can be probed at >5σ significance.

W-jet tagging effectively identifies the signal.

Proposed method can measure the key parameter f.

Abstract

We study the Littlest Higgs model with T-parity (LHT) in the process of $pp \to W_H^+W_H^- \to W^+W^- A_H A_H$ at the 14 TeV LHC. With the $W$-jet tagging technique, we demonstrate that the bulk of the model parameter space can be probed at the level of more than $5\sigma$ in the signature of two fat $W$-jets plus large missing energy. Furthermore, we propose a novel strategy of measuring the principle parameter $f$ that is crucial to testify the LHT model and to fix mass spectrum, including dark matter particle. Our proposal can be easily incorporated into current experimental program of diboson searches at the LHC Run-II.