Spectroscopy of Low Energy Neutrinos from the Sun

TL;DR

This paper discusses two methods for detecting low-energy solar neutrinos using liquid scintillators and TPCs, focusing on their potential to observe neutrino oscillation effects in the sub-MeV energy range.

Contribution

It introduces and compares two novel approaches for solar neutrino spectroscopy in the low-energy regime, emphasizing background reduction challenges.

Findings

Both methods are at stages where background suppression is critical.

Neutrino oscillation effects are significant in the sub-MeV energy range.

Detection of solar neutrinos in this energy region is feasible with improved background control.

Abstract

Two methods are discussed for the solar neutrino spectroscopy in the sub-MeV region: absorption in a loaded liquid scintillator and elastic scattering in a TPC. The different neutrino oscillation solutions predict a strong effect in this energy region where the largest fraction (\sim 98%) of solar neutrinos lies. Both projects have reached the stage where they have to prove their capability to attain a background low enough for solar neutrino detection.