About the end of the electron spectrum in five-lepton ${\mu }^{+}$ decay

N. P. Merenkov, O. N. Scekhovtsova

The spectrum of very fast electrons in five-lepton decay ${\mu }^{+}\to e^{-}{e}^{+}{e}^{+}\nu \bar{\nu },$ that is the main background decay at the study of the muonium-antimuonium conversion in vacuum, i…