Testing the linearity of electron calibration in the ATLAS detector

Precise calibration of electron and photon energies are required when conducting measurements and analysis at the LHC. The standard calibration procedure of ATLAS is to use large samples of Z→ee events, and correct the response in the data to the Monte Carlo. This goal of this project was to examine the calibration at different electron energy scales by testing the energy response of the Data against the MC for different transverse momentum of the Z boson. The linearity in the response is important for predicting the calibration of high energy electron and photon objects. Uncertainties in the linearity of the energy response is currently one of the main uncertainties in several precision measurement and could be improved thanks to the large Dataset collected during run 2.