Exploring the heavy quark sector of the Bestest Little Higgs model at the LHC

TL;DR

This paper investigates the discovery potential of heavy quarks predicted by the Bestest Little Higgs model at the LHC, analyzing pair and single production channels and comparing results with CMS experimental limits.

Contribution

It provides new mass limits for top partners in the Bestest Little Higgs model based on LHC data, considering different Yukawa coupling scenarios.

Findings

CMS data excludes top partner masses below 413 GeV in one scenario.

CMS data excludes top partner masses below 364 GeV in another scenario.

Analysis of pair and single production channels enhances understanding of heavy quark detection.

Abstract

We present discovery limits for heavy quarks in the Bestest Little Higgs model via pair production at the LHC running at $\sqrt{s} = 7 \mathrm{TeV}$. We study pair produced heavy top-like quarks decaying to $b\bar{b}W^+W^-$ and $t\bar{t}ZZ$ final states and singly produced heavy top-like quarks via t-channel $W$ exchange. These results are compared to currently available limits on heavy top-like quark cross sections from CMS (with 1.14 fb$^{-1}$ integrated luminosity) for two scenarios of Yukawa couplings. We find that the CMS data limits the mass of the lightest top partner to larger than 413 GeV in the first scenario, where the two lightest top-partners have a small mass splitting, and 364 GeV in the second scenario, where the mass splitting between the two lightest top-partners is larger.