Separation of $e^{+}{e}^{-}\to e^{+}{e}^{-}$ and $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ events using SND detector calorimeter

Abstract

The technique of discrimination of the $e^{+}{e}^{-}\to e^{+}{e}^{-}$ and $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ events in energy range $0.5<\sqrt{s}<1$ GeV by energy deposition in the calorimeter of SND detector was developed by applying machine learning method. Identification efficiency for $e^{+}{e}^{-}\to e^{+}{e}^{-}$ and $e^{+}{e}^{-}\to {\pi }^{+}{\pi }^{-}$ events in the range from 99.3 to 99.8 % has been achived.