Monte Carlo event generation of neutrino–electron scattering

Abstract

Abstract We describe an extension of the NuWro Monte Carlo neutrino event generator with the neutrino–electron scattering processes. This new dynamical channel includes the charged current and neutral current interactions, together with their interference, for ν ℓ e and ν ̄ ℓ e (ℓ = e, μ, τ) scatterings, resulting in ten possible final states. We illustrate the performance of the new functionality on few physical examples, including an estimation of the background in the T2K ν μ → ν e oscillation experiment. We show that the background events arising from the neutrino–electron interactions occupy mostly a distinct region of the phase space and can be easily separated.