Summary #290

Dark-matter detector observes exotic nuclear decay
  • Physicists have achieved the first direct observation of two-neutrino double electron capture in xenon-124 nuclei.
  • This experiment is an important step towards changing the standard model of particle physics that our view of the world is based on.
  • Using a dark-matter detector, the XENON Collaboration looked for the decay of xenon-124 to tellurium-124, which involves two-neutrino double electron capture.
  • It is the standard-model equivalent of neutrinoless double electron capture, a type of nuclear decay that is key to proving certain new theories.


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