# Constraint of the MINERvA Medium Energy Neutrino Flux using Neutrino-Electron Elastic Scattering

## TL;DR

This paper presents the most precise measurement of neutrino-electron elastic scattering, significantly reducing flux uncertainty in the MINERvA experiment and demonstrating a technique applicable to future neutrino beams like LBNF.

## Contribution

It introduces a highly precise neutrino flux constraint method using neutrino-electron scattering, improving flux normalization accuracy for MINERvA and future experiments.

## Key findings

- Reduced flux normalization uncertainty from 7.5% to 3.9%.
- Achieved the most precise neutrino-electron scattering measurement to date.
- Demonstrated a technique applicable to future neutrino beam experiments.

## Abstract

Elastic neutrino scattering on electrons is a precisely-known purely leptonic process that provides a standard candle for measuring neutrino flux in conventional neutrino beams. Using a total sample of 810 neutino-electron scatters after background subtraction, the measurement reduces the normalization uncertainty on the muon neutrino NuMI flux between 2 and 20 GeV from 7.5% to 3.9%. This is the most precise measurement of neutrino-electron scattering to date, will reduce uncertainties on MINERvA's absolute cross section measurements, and demonstrates a technique that can be used in future neutrino beams such as LBNF.