Overview of electron performances from Run I. Identification to isolation at ATLAS detector

Most physics analyses carried out using the data collected by the ATLAS experiment in pp collision at centre-of-mass energies of √(s)=7 and 8 TeV need a deep understanding of electron reconstruction and identification requirements. In addition, isolation criteria are usually imposed on electrons to further reject other particles mis-identified as electrons. Impact parameter requirements play an important role to select tracks compatible with the primary vertex of interaction. A detailed study of electron performances (efficiencies, data to MC correction factors) on Run I data, using the above mentioned selection requirements for electrons, is presented together with an outlook at the expectations for Run II.