ATLAS Tile Calorimeter performance for the phase II upgrade

The first part of the internship is focused on trying to assess the performance of the upgraded geometry of the ATLAS Tile Calorimeter. To do this, we use Monte Carlo generated samples for the upgraded geometry and from the current geometry, then we derive the pT response and resolution. The second part of the study is an analysis of the sensitivity of the two different geometries to a new heavy boson that would decay into a top quark pair $Z^{\prime} \rightarrow t\bar{t}$.