Search for the production of single vector-like and excited quarks in the $Wt$ final state in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector

Understand

A search for vector-like quarks and excited quarks in events containing a top quark and a $W$ boson in the final state is reported here.

• The search is based on $20.3 {fb}^{-1}$ of proton--proton collision data taken at the LHC at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector.
• Events with one or two leptons, and one, two or three jets are selected with the additional requirement that at least one jet contains a $b$-quark.
• Single-lepton events are also required to contain at least one large-radius jet from the hadronic decay of a high-$p_\mathrm{T}$ $W$ boson or a top quark.