Absolute neutrino mass
Neutrino oscillations show that neutrinos have mass differences, but they do not tell us the absolute masses. How light are these elusive particles?
Neutrinos
Their masses, matter–antimatter behavior and interactions with nuclei.
Subjects: Particle physics
Problems in this collection
5 problemsMajorana nature of neutrinos
A neutrino might be its own antiparticle. Establishing whether that is true would change how we understand neutrino mass and a basic particle-number symmetry.
Neutrino mass ordering
Neutrinos have three mass states. Which is heavier: the close pair or the third state?
Leptonic CP violation
Do neutrinos and antineutrinos change flavour differently in a way that violates charge–parity symmetry?
Gallium anomaly
Gallium detectors exposed to intense laboratory neutrino sources make fewer germanium atoms than standard capture calculations predict. Is the missing yield a nuclear-calculation problem, a measurement effect or new neutrino physics?