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The topcolor-assisted technicolor (TC2) model predicts some light pseudogoldstone bosons (PGBs), which may be accessible at the LHC or ILC. In thiswork we study the pair productions of the charged or neutral PGBs at the LHCand ILC. For the productions at the LHC we consider the processes proceedingthrough gluon-gluon fusion and quark-antiquark annihilation, while for theproductions at the ILC we consider both the electron-positron collision and thephoton-photon collision. We find that in a large part of parameter space theproduction cross sections at both colliders can be quite large compared withthe low standard model backgrounds. Therefore, in future experiments theseproductions may be detectable and allow for probing TC2 model.

PGB pair production at LHC and ILC as a probe of the topcolor-assisted technicolor models