Implications of the first CONUS+ measurement of coherent elastic neutrino-nucleus scattering

Valentina De Romeri, Dimitrios K. Papoulias, Gonzalo Sanchez Garcia

Published 2025-01-29Version 1

The CONUS+ collaboration has reported their first observation of coherent elastic neutrino-nucleus scattering (CE$\nu$NS).The experiment uses reactor electron antineutrinos and germanium detectors with recoil thresholds as low as $160~\mathrm{eV_{ee}}$. With an exposure of $347$ kg $\times$ d, the measurement was made with a statistical significance of $3.7 \sigma$. We explore several physics implications of this observation, both within the Standard Model and in the context of new physics. We focus on a determination of the weak mixing angle, non-standard and generalized neutrino interactions both with heavy and light mediators, neutrino magnetic moments, and the up-scattering of neutrinos into sterile fermions through the sterile dipole portal and new mediators. Our results highlight the r\^ole of reactor-based CE$\nu$NS experiments in probing a vast array of neutrino properties and new physics models.