Future perspectives for a weak mixing angle measurement in coherent elastic neutrino nucleus scattering experiments

TL;DR

Future CENNS experiments, especially with reactor antineutrinos, hold great promise for precisely measuring the weak mixing angle at low energies, testing the Standard Model, and exploring new physics.

Contribution

This paper analyzes the potential of upcoming CENNS experiments to improve the measurement of the weak mixing angle at low energies.

Findings

Future experiments can significantly improve the precision of the weak mixing angle measurement.

Reactor antineutrino-based CENNS experiments are particularly promising.

Enhanced measurements could test Standard Model predictions and reveal new physics.

Abstract

After the first measurement of the coherent elastic neutrino nucleus scattering (CENNS) by the COHERENT Collaboration, it is expected that new experiments will confirm the observation. Such measurements will allow to put stronger constraints or discover new physics as well as to probe the Standard Model by measuring its parameters. This is the case of the weak mixing angle at low energies, which could be measured with an increased precision in future results of CENNS experiments using, for example, reactor antineutrinos. In this work we analyze the physics potential of different proposals for the improvement of our current knowledge of this observable and show that they are very promising.