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Measurement of the ν_{e}-Nucleus Charged-Current Double-Differential Cross Section at ⟨E_{ν}⟩=2.4  GeV Using NOvA.

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The NOvA experiment measured electron neutrino cross sections, presenting the largest dataset to date. Analysis revealed systematic uncertainties limit precision, with current models showing varied agreement with the new electron neutrino cross-section data.

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Area of Science:

  • Particle Physics
  • High-Energy Physics
  • Neutrino Physics

Background:

  • Neutrino cross-section measurements are crucial for understanding neutrino oscillations and fundamental interactions.
  • Accurate cross-section models are essential for interpreting results from neutrino oscillation experiments like NOvA.

Purpose of the Study:

  • To measure the inclusive electron neutrino charged-current cross section using a large dataset from the NOvA near detector.
  • To present double-differential cross sections in electron energy and angle for the first time.
  • To compare experimental data with predictions from leading neutrino event generators.

Main Methods:

  • Utilized 8.02×10^20 protons-on-target from the NuMI beam at the NOvA near detector.
  • Analyzed a large sample of GeV electron neutrino interactions.
  • Measured double-differential cross sections and single-differential cross sections in Q^2 and energy.

Main Results:

  • The measurement is limited by ~17% systematic uncertainties, surpassing statistical uncertainties (~7.4%).
  • Presented the double-differential cross section in electron energy and angle for electron neutrino interactions.
  • Compared results to GENIE, GiBUU, NEUT, and NuWro generators, finding no single model consistently favored across all measured cross sections.

Conclusions:

  • The NOvA data provide a new benchmark for electron neutrino cross-section measurements.
  • The comparison highlights areas where current neutrino event generators may require refinement.
  • Further study is needed to resolve discrepancies between models and experimental data, particularly concerning the Q^2 dependence.