What are Neutrinos?

Feb. 10, 2025

Chinese scientists recently placed special detectors deep in the South China Sea to explore the possibility of building a huge underwater observatory to find neutrinos.

About Neutrinos:

  • Also called ghost particles, neutrinos are nearly massless, electrically neutral subatomic particles that interact extremely weakly with matter.
  • Their tendency not to interact very often with other particles makes detecting them very difficult.
  • First predicted in 1930, they weren’t discovered in experiments until 1956, and scientists thought they were massless until recently.
  • They belong to the family of particles called leptons, which are not subject to the strong force. Rather, neutrinos are subject to the weak force that underlies certain processes of radioactive decay.
  • Source: Neutrinos come from all kinds of different sources and are often the product of heavy particles turning into lighter ones, a process called “decay.”
  • They are the most common particles in the universe.
    • Approximately 100 trillion neutrinos pass completely harmlessly through your body every second.
  • Neutrinos play crucial roles in the standard model of particle physics, in stellar physics and black holes, and even in cosmology and the nature of the Big Bang.

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