"A neutrino is a fermion that interacts only via the weak interaction and gravity. It is electrically neutral and has a rest mass that was long thought to be zero."
The study of the behavior and properties of neutrinos, subatomic particles with very low mass and no electric charge.
"The weak force has a very short range, and the gravitational interaction is extremely weak due to the very small mass of the neutrino."
"Neutrinos typically pass through normal matter unimpeded and undetected."
"The three flavors of neutrinos are the electron neutrino, muon neutrino, and tau neutrino, each associated with the correspondingly named charged lepton."
"Although neutrinos were long believed to be massless, it is now known that there are three discrete neutrino masses with different tiny values."
"Similar to some other neutral particles, neutrinos oscillate between different flavors in flight as a consequence."
"Antineutrinos are the corresponding antiparticles of neutrinos. They have opposite-signed lepton number and weak isospin, and right-handed instead of left-handed chirality."
"To conserve total lepton number in nuclear beta decay, electron neutrinos only appear together with positrons or electron-antineutrinos, whereas electron antineutrinos only appear with electrons or electron neutrinos."
"Neutrinos are created by various radioactive decays, natural nuclear reactions, artificial nuclear reactions, supernovas, and when cosmic rays or accelerated particle beams strike atoms."
"The majority of neutrinos detected on Earth are from nuclear reactions inside the Sun."
"At the surface of the Earth, the flux of solar neutrinos is about 65 billion (6.5x10^10) per second per square centimeter."
"Neutrinos can be used for tomography of the interior of the Earth."