Speaker
Georgy Raikov
Description
Hep neutrinos from the Sun produced in the reaction $ {} ^ {3} He + p → {} ^{4}He + e^+ + ν_e$. According to Standard Solar Model (SSM) these neutrinos have the highest possible energies (E < 18.8 MeV) and the lowest flux (~ $10^3 cm^{-2} s^{-1}$). In Borexino the study of hep neutrinos is possible through the neutrino-electron elastic scattering and by means of neutral current reaction with carbon ${}^{12}C(ν,ν´){}^{12}C^*$. An upper limit on the integral total flux of hep neutrinos of $1.8 ∙ 10^5 cm^{-2}s^{-1}$ has been derived at the 90% C.L.
