The littlest Higgs model with T-parity and single top production at $ep$   collision
  Based on calculating the contributions of the littlest Higgs model with T-parity (called $LHT$ model) to the anomalous top coupling $tq\gamma$ ($q=u$ or $c$), we consider single top production via the t-channel partonic process $eq\to et$ at $ep$ collision. Our numerical results show that the production cross section in the $LHT$ model can be significantly enhanced relative to that in the standard model. 
Chong-Xing Yue, Jia Wen, Jin-Yan Liu, Wei Liu