Production of Neutral Top-Pion Associated with a Gauge Boson at LHC

In this paper,we study the production of the neutral top-pion(Π~o)associated with a gauge boson at theLHC,i.e.pp→Π~o(V=g,W,Z,γ).The cross section of pp→Π~og is at the level of 10~2 pb in the most parameterspace.Such a process with the flavor-changing decay mode Π~o→t might provide viable signatures to detect Π~o atthe LHC.The cross sections of other processes pp→Π~oW(Z,γ)are too small to detect Π~o,which open a window todistinguish the Higgs boson in the SM or MSSM from Π~o.