Measuring the Weak Mixing Angle in the DUNE Near-Detector Complex.

Area of Science:

• Particle Physics
• Neutrino Physics
• Electroweak Interactions

Background:

• The DUNE experiment aims for high precision in neutrino physics.
• Neutrino-electron scattering offers a unique probe of electroweak interactions.

Purpose of the Study:

• To assess the sensitivity of the DUNE-PRISM near detector to neutrino-electron scattering.
• To determine the impact of DUNE-PRISM on constraining electron weak couplings.
• To measure the weak mixing angle (sin²θW) at low energy scales.

Main Methods:

• Utilizing precision measurements of neutrino-electron scattering at the DUNE experiment.
• Employing the movable DUNE-PRISM near detector, oriented perpendicular to the beam line.
• Analyzing data from seven years of DUNE operation.

Main Results:

• DUNE-PRISM significantly enhances the ability to constrain electron weak couplings.
• A precision of approximately 2% for the weak mixing angle (sin²θW) is achievable.
• The study explores combining neutrino-electron scattering with neutrino trident production.

Conclusions:

• The DUNE experiment, particularly with DUNE-PRISM, will provide crucial insights into fundamental electroweak parameters.
• Precision measurements of neutrino-electron scattering are vital for probing beyond the Standard Model physics.
• The weak mixing angle measurement will be a significant contribution to low-energy particle physics.