Stefano Manzoni (Università degli Studi e INFN Milano (IT), LPNHE Paris)
An accurate calibration of the energy measurement of electron and photon is paramount for many ATLAS physics analysis. The calibration of the energy measurement is performed in-situ using a large statistics of Z->ee events. A pre-requisite of this calibration is a good understanding of the material in front of the calorimeter and of the inter-calibration of the different calorimeter layers. Z->ee events are also employed to measure the energy resolution. The results obtained with the pp collisions data recorded in 2015 at sqrt(s)= 13 TeV, corresponding to an integrated luminosity of 3.2 fb-1, as well as the corresponding uncertainties on the electron and photon energy scales, are presented.
Collaboration ATLAS (ATLAS)