2015/09/30 by Borexino Collaboration, M. Agostini, S. Appel +95
Physics and Astronomy · #hep-ex #physics.ins-det
paper · pdf · doi:10.1103/physrevlett.115.231802
published as Phys. Rev. Lett. 115, 231802 (2015) · 5 pages, 1 figure
arxiv created 2015/11/11 · arxiv updated 2015/12/09
Borexino is a liquid scintillation detector located deep underground at the Laboratori Nazionali del Gran Sasso (LNGS, Italy). Thanks to the unmatched radio-purity of the scintillator, and to the well understood detector response at low energy, a new limit on the stability of the electron for decay into a neutrino and a single mono-energetic photon was obtained. This new bound, tau > 6.6 10**28 yr at 90 % C.L., is two orders of magnitude better than the previous limit.