# Measurement of the antineutrino to neutrino charged-current interaction cross section ratio in MINERvA

## TL;DR

This paper reports precise measurements of neutrino and antineutrino charged-current cross sections on carbon and their ratio in the 2-22 GeV energy range using MINERvA, improving understanding of neutrino interactions.

## Contribution

The study provides the most precise measurements to date of the antineutrino-nucleus cross section and the ratio Rcc below 6 GeV, utilizing a novel flux determination method within the same experiment.

## Key findings

- Achieved 5% precision in the Rcc ratio at low energies.
- Provided the most accurate cross section data below 6 GeV.
- Demonstrated the effectiveness of internal normalization techniques.

## Abstract

We present measurements of the neutrino and antineutrino total charged-current cross sections on carbon and their ratio using the MINERvA scintillator-tracker. The measurements span the energy range 2-22 GeV and were performed using forward and reversed horn focusing modes of the Fermilab low-energy NuMI beam to obtain large neutrino and antineutrino samples. The flux is obtained using a sub-sample of charged-current events at low hadronic energy transfer along with precise higher energy external neutrino cross section data overlapping with our energy range between 12-22 GeV. We also report on the antineutrino-neutrino cross section ratio, Rcc, which does not rely on external normalization information. Our ratio measurement, obtained within the same experiment using the same technique, benefits from the cancellation of common sample systematic uncertainties and reaches a precision of 5% at low energy. Our results for the antineutrino-nucleus scattering cross section and for Rcc are the most precise to date in the energy range $E_{\nu} <$ 6GeV.