First real time detection of 7Be solar neutrinos by Borexino
Physics Letters B Volume 658, Issue 4, 3 January 2008, Pages 101-108
(Submitted 10 August 2007, Revised 12 September 2007, Accepted 20 September 2007, Available online 5 October 2007).
[doi:10.1016/j.physletb.2007.09.054] (local copypreprint on arXiv)


Abstract

This Letter reports a direct measurement of the 7Be solar neutrino signal rate performed with the Borexino low background liquid scintillator detector at the Laboratori Nazionali del Gran Sasso. This is the first real-time spectral measurement of sub-MeV solar neutrinos. The result for 0.862 MeV 7Be neutrinos is 47±7stat±12sys counts/(day⋅100ton), consistent with predictions of Standard Solar Models and neutrino oscillations with LMA-MSW parameters.

Borexino first results have got some press coverage (partial list):

First real time detection of 7Be solar neutrinos by Borexino