New experimental limits on heavy neutrino mixing in 8B decay obtained with the Prototype of the Borexino Detector

New experimental limits on heavy neutrino mixing in 8B-decay obtained with the Borexino Counting Test Facility Journal of Experimental and Theoretical Physics Letters  Volume 78, pages 261–266 (2003) Published: September 2003 doi:10.1134/1.1625721  (local copy) Abstract If heavy neutrinos with mass are emitted