First real time detection of Be7 solar neutrinos by Borexino

TL;DR

This paper presents the first real-time spectral measurement of Be7 solar neutrinos using Borexino, confirming predictions of solar models and neutrino oscillation parameters.

Contribution

It provides the first direct, real-time detection of Be7 solar neutrinos with a low-background liquid scintillator detector.

Findings

Measured Be7 neutrino rate of 47 ± 7 (stat) ± 12 (sys) counts/(day x 100 ton)

Results are consistent with Standard Solar Models and neutrino oscillation theories

First real-time spectral measurement of sub-MeV solar neutrinos

Abstract

This paper reports a direct measurement of the Be7 solar neutrino signal rate performed with the Borexino low background liquid scintillator detector. This is the first real-time spectral measurement of sub-MeV solar neutrinos. The result for 0.862 MeV Be7 is 47 +- 7 (stat} +- 12 (sys} counts/(day x 100 ton), consistent with predictions of Standard Solar Models and neutrino oscillations with LMA-MSW parameters.