Measurement of inverse muon decay ${\nu }_{\mu }$+e→${\mu }^{\mathrm{-}}$+${\nu }_e$ at Fermilab Tevatron energies 15–600 GeV

We report on a measurement of inverse muon decay ${\nu }_{\mu }$+e→${\mu }^{\mathrm{-}}$+${\nu }_e$ at the Fermilab Tevatron. A sample of 1151 inverse-μ-decay events, produced by neutrinos with laboratory energy in the range 15≤$E_{\nu }$≤600 GeV, is extracted. We measure the rate of this reaction with respect to the ${\nu }_{\mu }$-N charged-current interaction to be [0.125±0.009(stat)±0.003(syst)]×${10}^{\mathrm{-}2}$. The measurement supports V—A structure of the weak current, left-handed two-component neutrinos, and a cross section rising linearly with respect to the center-of-mass energy.