First measurement of low-energy solar neutrinos scattering off electrons

The XENONnT dark‑matter experiment measured solar neutrinos scattering off electrons at record‑low energies, delivering the faintest neutrino signal yet recorded. Mirage News and DongA Science report the detector captured these neutrinos while continuing its dark‑matter search, and Scientific American notes the observation sets a new low‑energy benchmark.

However, coverage does not detail the exact energy range or statistical significance, leaving the precise threshold open. Phys.org emphasizes that this is the first direct electron‑scattering measurement at such energies, expanding the experimental toolkit for solar‑neutrino physics.

The result demonstrates that XENONnT can achieve sensitivities beyond its original dark‑matter mandate, according to the articles, and suggests that future detector upgrades may pursue both dark‑matter and low‑energy neutrino targets.