Constraining Top partner and Naturalness at the LHC and TLEP

Understand

We investigate indirect constraints on the top partner within the minimal fermionic top partner model.

• By performing a global fit of the latest Higgs data, $B_s \to \mu^+\mu^-$ measurements and the electroweak precision observables we find that the top partner with the mass up to 830 GeV is excluded at $2\sigma$ level.
• Our bound on the top partner mass is much stronger than the bounds obtained from the direct searches at the LHC.
• Under the current constraints the fine-tuning measure is less than 9% and the branching ratio of $T \to tZ$ is bounded between 14% and 25%.