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Measuring the weak mixing angle at SBND
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abstract
The weak mixing angle provides a sensitive test of the Standard Model. We study SBND's sensitivity to the weak mixing angle using neutrino-electron scattering events. We perform a detailed simulation, paying particular attention to background rejection and estimating the detector response. We find that SBND can provide a reasonable constraint on the weak mixing angle, achieving 8% precision for $10^{21}$ protons on target, assuming an overall flux normalization uncertainty of 10%. This result is superior to those of current neutrino experiments and is relatively competitive with other low-energy measurements.
Forward citations
Cited by 2 Pith papers
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Bounds on new neutrino interactions from the first CE$\nu$NS data at direct detection experiments
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Elastic Neutrino-electron Scattering at the One-loop Level in the Standard Model
An updated complete one-loop Standard Model calculation of elastic neutrino-electron scattering, validated against prior calculations, is used to predict JUNO and TAO event rates.
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