Study of electrons energy resolution, in CMS(LHC) еxperiment using simulated data

This work is dedicated to the study of energy resolution of electrons in CMS (LHC) [1] experiment using simulated data of “Drell-Yan” process with $e–e+$ yield in pp-interactions at $\sqrt{s} = 13 TeV$. The work contains a brief description of event modeling and electron reconstruction from the simulated data. Energy resolution was estimated from the distribution of reconstructed and generated electrons transverse energies ratio. Two approaches has been used in calculations. In the first approach – the standard definition of energy resolution has been used (Full width at half maximum – FWHM), and in the second – as a describing value for energy resolution the root mean square of distribution has been taken.