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This study presents the first global analysis of neutrino scattering data, finding no significant deviations from the Standard Model (SM) for neutrino charge radius. Future experiments may resolve remaining data ambiguities.

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Area of Science:

  • Particle Physics
  • Neutrino Physics
  • Standard Model Extensions

Background:

  • The Standard Model (SM) explains particle physics but has anomalies, particularly in neutrino behavior.
  • Neutrino electromagnetic properties, like charge radius, are crucial for testing SM completeness.
  • Existing data require comprehensive analysis within a consistent framework to probe beyond-SM physics.

Purpose of the Study:

  • To conduct the first global fit of elastic neutrino-nucleus and neutrino-electron scattering data.
  • To rigorously test the Standard Model (SM) and search for new physics effects.
  • To constrain neutrino properties, including charge radius and neutral current couplings.

Main Methods:

  • Global analysis of elastic neutrino-nucleus and neutrino-electron scattering datasets.
  • Incorporation of solar neutrino data from dark matter direct detection experiments.
  • Flavor- and momentum-dependent analysis of neutrino-electron neutral current couplings.

Main Results:

  • No significant deviation observed for the neutrino charge radius, indicating no large beyond-SM flavor-dependent effects for electron and muon neutrinos.
  • Most stringent constraints placed on the tau neutrino charge radius from neutrino scattering experiments.
  • Two allowed solutions for neutrino-electron neutral current couplings: one SM-like and a favored degenerate solution.

Conclusions:

  • The study highlights the importance of precise neutrino data for testing the Standard Model.
  • Future dark matter detectors possess the precision needed to resolve the observed data degeneracy.
  • Accurate accounting for flavor- and momentum-dependent effects is critical for interpreting neutrino data in the precision era.