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 copy; preprint 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):
- Aug 27, 2007: Borexino featured on /.
- Aug 20, 2007: Borexino featured on “Le Scienze” (Italian edition of “Scientific American“)
- Aug 20, 2007: Borexino featured on “La Repubblica” (Italian)
- Aug 20, 2007: NSF Press Release 07-105: “Catching Some Rays”
First real time detection of 7Be solar neutrinos by Borexino