Solar Neutrinos

TL;DR

This paper reviews current and future solar neutrino measurements, highlighting evidence for neutrino flavor change, disfavoring sterile neutrino transitions, and emphasizing upcoming experiments for more precise neutrino flux and flavor studies.

Contribution

It summarizes recent findings on solar neutrino flavor change and discusses planned experiments to improve measurement accuracy and explore neutrino properties.

Findings

Solar electron neutrinos change to other active types.

Transitions solely to sterile neutrinos are disfavored.

Future experiments will enhance measurement precision.

Abstract

Present results and future measurements of solar neutrinos are discussed. The results to date indicate that solar electron neutrinos are changing to other active types and that transitions solely to sterile neutrinos are disfavored. The flux of $^{8}B$ solar neutrinos produced in the Sun, inferred assuming only active neutrino types, is found to be in very good agreement with solar model calculations. Future measurements will focus on greater accuracy for charged current and neutral current sensitive reactions to provide more accurate measurements of neutrino flavour change and further studies of day-night flux differences and spectral shape. Other experiments sensitive to lower energy solar neutrinos will be in operation soon.