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

In this paper, we study the production of the neutral top-pion (Π0t) associated with a gauge boson at the LHC, i.e. pp→Πt0V (V = g,W,Z,γ). The cross section of pp→Πt0g is at the level of 102 pb in the most parameter space. Such a process with the flavor-changing decay mode Πt0→t c-bar might provide viable signatures to detect Π0t at the LHC. The cross sections of other processes pp→Πt0W(Z,γ) are too small to detect Π0t, which open a window to distinguish the Higgs boson in the SM or MSSM from Π0t.