====== Anti-Neutrinos ====== >The electron neutrino has a corresponding antiparticle, the electron antineutrino (νe), which differs only in that some of its properties have equal magnitude but opposite sign. __One open question of particle physics is whether or not neutrinos and anti-neutrinos are the same particle,__ in which case it would be a Majorana fermion, or whether they are different particles, in which case they would be Dirac fermions.\\ \\ Source : [[https://en.wikipedia.org/wiki/Electron_neutrino#Electron_antineutrino|Wikipedia]] Several experiments are underway at research facilities to try to determine whether neutrinos and anti-neutrinos are in fact the same particle, e.g. GERDA, EXO, and SNO+. (see [[https://en.wikipedia.org/wiki/Neutrino#Majorana_mass|Wikipedia]]) As yet there are no firm results. ---- Also see : [[content:physics:quantum_physics:neutrino_mass]]