Lepton and photon reconstruction and identification performance in ATLAS and CMS

In this paper I report on lepton and photon performance results obtained by the ATLAS and CMS experiments during the Run-2 operations of the Large Hadron Collider (LHC) focusing on muons, electrons and photons. Such particles are key to the most important physics results published at the LHC, including the Higgs boson discovery, precision measurements of Standard Model processes (SM) and searches for new physics beyond the SM. The paper first describes the reconstruction and identification efficiencies and the isolation studies for the two experiments. In addition, for electrons and photons the energy calibration strategy is mentioned, while for muons results on the muon momentum scale and resolution are reported. On the contrary of the Run-1 data-taking operations, Run-2 operations are characterized by challenging pile-up conditions. Despite of that, both the experiments are able to cope with higher rates achieving high-quality results.