The performance is presented of the reconstruction and identification algorithms for electrons and photons with the CMS experiment at the LHC. The reported results are based on proton-proton collision data collected at a center-of-mass energy of 13 TeV and recorded in 2016–2018, corresponding to an integrated luminosity of 136 fb^-1. Results obtained from lead-lead collision data collected at √(s_NN)=5.02 TeV are also presented. Innovative techniques are used to reconstruct the electron and photon signals in the detector and to optimize the energy resolution. Events with electrons and photons in the final state are used to measure the energy resolution and energy scale uncertainty in the recorded events. The measured energy resolution for electrons produced in Z boson decays in proton-proton collision data ranges from 2 to 5%, depending on electron pseudorapidity and energy loss through bremsstrahlung in the detector material. The energy scale in the same range of energies is measured with an uncertainty smaller than 0.1 (0.3)% in the barrel (endcap) region in proton-proton collisions and better than 1 (3)% in the barrel (endcap) region in heavy ion collisions. The timing resolution for electrons from Z boson decays with the full 2016–2018 proton-proton collision data set is measured to be 200 ps.

通过 LHC 的 CMS 实验，展示了电子和光子的重建和识别算法的性能。报告的结果基于在 13 TeV 质心能量收集并在 2016-2018 年记录的质子-质子碰撞数据，对应于 136 fb^-1 的综合光度。_{从 √(s NN}处收集的铅-铅碰撞数据中获得的结果)=5.02 TeV 也出现了。创新技术用于重建探测器中的电子和光子信号并优化能量分辨率。电子和光子处于最终状态的事件用于测量记录事件中的能量分辨率和能量尺度不确定性。在质子-质子碰撞数据中，Z 玻色子中产生的电子的测量能量分辨率在 2% 到 5% 之间，具体取决于探测器材料中通过轫致辐射的电子伪快速性和能量损失。测量相同能量范围内的能量标度，在质子-质子碰撞中，桶（端盖）区域的不确定度小于 0.1 (0.3)%，重质子碰撞中桶（端盖）区域的不确定度优于 1 (3)%离子碰撞。