• Fundamental particle that has:
    • No charge
    • Mass that is tiny relative to an electron
  • Interact very weakly with other matter
  • Difficult to detect

Solar Neutrino Problem

  • Discrepancy between solar neutrinos measured and the predicted amount
    • Predicted from the Sun's luminosity
    • Much lower measured than predicted
  • Neutrinos from the Sun have mixed quantum states so our detectors couldn't always detect them
    • We were looking for electron neutrinos
    • The neutrinos from the Sun could propagate into a mixture of electron, muon, and tau neutrinos
      • Neutrino oscillation

Astronomy Physics Particle