Detailed Study of Muon and J/Psi Combined Reconstruction in the Environment of Beauty Events

The muon and J/Psi combined reconstruction was studied in an environment of Beauty events. It was used a full simulation of all the relevant components of the ATLAS detector. In particular, the reconstruction efficiency of the two muons from the J/Psi meson was studied in details. It was observed that the muon reconstruction efficiency decreases in the case of the two close muons. However, this problem has been clarified that is not in the reconstruction but in the simulation stage, digitization of TGC's, of DICE version for Physics TDR and is going to be fixed by the new version of DICE.