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.
Highlights
Conventional neutrino beams are used extensively in the study of neutrino oscillations
Precise measurement of neutrino-electron scattering to date, will reduce uncertainties on MINERνA’s absolute cross section measurements, and demonstrates a technique that can be used in future neutrino beams such as long baseline neutrino facility
This paper presents a similar measurement in the Neutrinos from the Main Injector (NuMI) medium energy (ME) beam
Summary
Conventional neutrino beams are used extensively in the study of neutrino oscillations. This paper presents a similar measurement in the NuMI medium energy (ME) beam Increases in both total exposure and in neutrino flux per proton on target in the ME configuration provide a factor of 9 increase in statistics over MINERνA’s earlier LE measurement. Improvements in systematic uncertainties arising from better knowledge of neutrino-nucleus scattering and improved understanding of the electron energy scale in the MINERνA detector have significantly reduced the total systematic uncertainty. This measurement provides a precise constraint on the normalization of the neutrino flux prediction at MINERνA and is complimentary to flux measurements using low hadronic recoil energy (low-nu) neutrino-nucleus interactions, which can be used to measure the shape of the neutrino flux as a function of energy.
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