Electron Identification and Efficiency Measurements in 2012

Introduction: The ATLAS Experiment requires efficient discrimination of electrons as a vital part of its physics program. Electron discrimination is achieved through discriminating variables from the Inner Detector and Electromagnetic Calorimeter. Electron efficiency measurements and uncertainties affect cross section measurements and searches. In order to use electron objects, electron efficiencies in the detector are measured and data-Monte Carlo scale factors are produced. Efficiencies are calculated in 2012 using in-situ methods with electrons from $Z\rightarrow ee$ and $J/\Psi\rightarrow ee$ resonances.