Production of the neutral toppion at the e gamma colliders

Abstract

In the framework of topcolor-assisted technicolor(TC2) model, we study a neutral toppion production process $e^{-}\gamma \to e^{-}{\Pi }_t^0$ in this paper. Our results show that the production cross section of $e^{-}\gamma \to e^{-}{\Pi }_t^0$ can reach the level of several tens fb, and over $10^3$ neutral toppion events can be produced in the planned $e^{+}{e}^{-}$ 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 $e^{-}\gamma \to e^{-}{\Pi }_t^0$ 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.

Comments: 12 pages, 4 figures, The paper has been accepted by Phys.Rev.D