In this paper we calculate the production of a charged top pion in association with a W boson via gg fusion at the CERN Large Hadron Collider in the context of the topcolor assisted technicolor model. We find that, the total cross section of pp --> g
g --> W^{pm}pi_t^{mp}, is several dozen femtobarns with reasonable values of the parameters, and the total cross section of pp --> W^{pm}pi_t^{mp} can reach a few hundred femtobarns when we consider the sum of the contributions of these two parton subprocesses gg --> W^{pm}pi_t^{mp} and bbar{b} --> W^{pm}pi_t^{mp}.
In this paper we calculate the technicolor correction to the production of a charged top pion in association with a W boson via bbar{b} annihilation at the CERN Large Hadron Collider in the context of the topcolor assisted technicolor model. We find
that the cross section of pp rightarrow bbar{b} -> W^{pm}pi_t^{mp} at the tree level can reach a few hundred femtobarns for reasonable ranges of the parameters, roughly corresponding to the result of the process pp -> bbar{b} -> W^{pm}H^{mp} in the minimal supersymmetric standard model; the relative corrections arising from the one-loop diagrams are about a few percent to two dozen percent, and they will increase the cross section at the tree level. As a comparison, we also discuss the size of the hadron cross section via the other subprocess gg -> W^{pm}pi_t^{mp}.
