T-odd top partner pair production in the dilepton final states at the LHC in the littlest Higgs Model with T-parity

TL;DR

This paper investigates the potential to detect T-odd top partner pairs in dilepton final states at the 14 TeV LHC within the littlest Higgs Model with T-parity, providing projected mass limits based on luminosity.

Contribution

It presents a detailed analysis of T-odd top partner pair production and decay signatures at the LHC, estimating the discovery reach and mass limits for various luminosities.

Findings

Lower mass limits for T-odd top partner are about 1.04-1.23 TeV at 2σ confidence with up to 300 fb$^{-1}$.

Mass limits can be increased to about 1.34-1.44 TeV with 1000-3000 fb$^{-1}$ luminosity.

The study demonstrates the observability of T-odd top partners in dilepton final states at high luminosity.

Abstract

In the littlest Higgs Model with T-parity, we discuss the pair production of the T-odd top partner ($T_{-}$) which decays almost 100\% into the top quark and the lightest T-odd particle ($A_{H}$). Considering the current constraints, we investigate the observability of the T-odd top partner pair production through the process $pp\rightarrow T_{-}\bar{T}_{-}\rightarrow t\bar{t}A_{H}A_{H}$ in final states with two leptons at 14 TeV LHC. We analyze the signal significance and find that the lower limit on the T-odd top partner mass are about 1.04 TeV, 1.14 TeV, 1.23 TeV at $2\sigma$ confidence level at 14TeV LHC with the integrated luminosity of 30 fb$^{-1}$, 100fb$^{-1}$, 300fb$^{-1}$. This lower limit can be raised to about 1.34(1.44) TeV if we use 1000(3000) fb$^{-1}$ of integrated luminosity.