Resolve the solar-neutrino detection precision gap

Develop and demonstrate instrumentation capable of measuring solar-neutrino fluxes, particularly the dominant pp component, with precision comparable to or better than Standard Solar Model predictions.

Background

Reactor antineutrino measurements have reduced the uncertainty associated with neutrino propagation, but present solar-neutrino detectors still lack the precision required for detailed tests of the Standard Solar Model. The remaining obstacle is experimental detection, especially the intrinsic carbon-14 background in the pp-neutrino energy region. The paper presents improved detector technologies, including indium-loaded LiquidO, as possible routes toward solving this problem, but does not claim that the challenge has been resolved.

References

The second, associated with the fact that no instrument yet reads solar neutrinos precisely enough to exploit that journey, remains open; a concrete instrumentation challenge whose solution — one at least — may be in the making if demonstrated.

— After 60 years, here comes the Sun  (2609.18799 - Cabrera et al., 16 Sep 2026) in Final section, “After 60 years, here comes the Sun”