Production of the neutral toppion at the e gamma colliders

In the framework of topcolor-assisted technicolor(TC2) model, we study a neutral toppion production process $e^{-}\gamma \to e^{-}{\mathrm{\Pi }}_t^0$ in this paper. Our results show that the production cross section of $e^{-}\gamma\to e^{-}\Pi^{0}_{t}$canreachthelevelofseveraltensfb,andover$10^{3}$neutraltoppioneventscanbeproducedintheplanned$e^+e^-$ linear colliders each year. Therefore, such a toppion production process provides us a unique chance to detect toppion events and test the TC2 model. On the other hand, the cross section of $e^{-}\gamma \to e^{-}{\mathrm{\Pi }}_t^0$ is about one order of magnitude larger than those of some similar processes in SM and MSSM(i.e., $e^{-}\gamma \to e^{-}H$ in SM and $e^{-}\gamma \to e^{-}{H}^0(A^0,h^0)$ in MSSM). So, we can easily distinguish the neutral toppion from other neutral Higgs bosons in SM and MSSM.