Probing signal characteristics of a maverick top decaying to a dark photon

Light dark matter candidate already become a focal point for many years. Dark photon, as a dark sector mediator is favoured by researchers. Astronomical data have already gives the constrains between the dark photon mass and kinetic mixing parameter. The maverick top partners model give a new way to produce the dark photon. If the mass of dark photon is around 100 MeV, the branching ratio for decaying into $e^{+}e^{-}$ pair is 1, giving rise to a lepton-jet signal in the detector. The particle level simulation has been done last year. This report will give a brief introduction of the target dark photon and continue the detector level analysis. By probing signal characteristics, the top quark is reconstructed. But we haven't obtained the correct dark photon signal because the overlap removal of the electron signal.