Top quark pair production via $e^{+}e^{-}$ collision in the littlest   Higgs model with T-parity at the ILC
  In the littlest Higgs model with T-parity, we studied the contributions of the new particles to the top-quark pair production via $e^{+}e^{-}$ collision at the International Linear Collider. We calculated the top-quark pair production cross section and found this process can generate significantly relative correction. The result may be a sensitive probe of the littlest Higgs model with T-parity. 
Bingfang Yang, Jinzhong Han, Lin Wang and Xuelei Wang
hep-ph