Measurement of the antineutrino to neutrino charged-current interaction cross section ratio in MINERvA
2017
We present measurements of the neutrino and antineutrino total
charged-currentcross 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
Fermilablow-energy
NuMIbeam to obtain large neutrino and antineutrino samples. The flux is obtained using a
sub-sampleof
charged-currentevents at low hadronic energy transfer along with precise higher energy external neutrino
cross section dataoverlapping 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.
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