Search for the vector-like top quark $T$ at the future linac-ring type   $ep$ collider
  The little Higgs models typically contain a new vector-like top quark $T$, which plays a key role in breaking the electroweak symmetry. In the context of the littlest Higgs (LH) model, we study single production of this kind of new particle via the process $ep\to eb\to \nu_{e}T$ in the future linac-ring type $ep$ collider (LC$\bigotimes LHC$). We find that the production cross section is in the range of $1.2\times 10^{-4}$-- 0.48 $pb$ at the $LC\bigotimes LHC$ with $\sqrt{s}=3.7$ $TeV$. 
Chong-Xing Yue, Feng Zhang, Wei Wang