tau neutrino

The tau is an elementary subatomic particle, similar to an electron but significantly heavier. It's a negatively charged member of the lepton family, with an antiparticle that is positively charged. Due to its mass, the tau is unstable and quickly decays into other particles via the weak force.1

Associated with the tau is a tau-neutrino, a neutral lepton produced during tau particle decay. The tau-neutrino, like other neutrinos, has no electric charge and very little mass, interacting only through the weak force. The existence of the tau-neutrino was experimentally confirmed in 2000. Neutrinos are fundamental components within the standard model of particle physics, which describes the interactions of subatomic particles.123