Results from ATLAS Tile Calorimeter: a comparison between data and Geant4 simulation

In this paper we present a study of the signal produced by electrons and pions of energies ranging between 1 GeV and 180 GeV in modules of ATLAS Tile Calorimeter. Results are compared to Geant4 simulation by analyzing linearity, resolution, e/π ratio and shower profile. The final goal is to tune and validate, in the simple Test Beam geometry, the Geant4 simulation program.