W~±πt-+ Associated Production at Large Hadron Collider

In this paper we calculate the production of a charged top pion in association with a W boson at theCERN Large Hadron Collider(LHC)in the context of the topcolor assisted technicolor model.We find that the crosssection of pp →b■→W~±πis roughly corresponding to the result of the process pp→b■→W~±Hin the minimalsupersymmetric standard model,and for reasonable ranges of the parameters,the cross section can reach a few hundredfb.The W~±πsignal should be clearly visible at LHC unless πis very heavy.