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arXiv · 2409.07430

Measuring the weak mixing angle at SBND

Gustavo F. S. Alves·Antonio P. Ferreira·Shirley Weishi Li·Pedro A. N. Machado·Yuber F. Perez-Gonzalez
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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.

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Gustavo F. S. Alves, Antonio P. Ferreira, Shirley Weishi Li, Pedro A. N. Machado, Yuber F. Perez-Gonzalez. 2024-09-11. Measuring the weak mixing angle at SBND. https://arxiv.org/abs/2409.07430

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