New limits on heavy sterile neutrino mixing in ${}^8\mathrm{B}$-decay obtained with the Borexino detector

Borexino collaboration, G. Bellini, J. Benziger +87

If heavy neutrinos with mass $m_{{\nu }_H}\ge$2$m_e$ are produced in the Sun via the decay ${}^8\mathrm{B}\to {}^8\mathrm{Be}+e^{+}+{\nu }_H$ in a side branch of pp-chain, they would…