A problem that arises every time you have two particles is to know which forces act between them. Now the elementary particles whose existence is established are nine—as we have said.

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Fourth Lecture The Search of an Attraction Between an Electron and a Neutron

  • Enrico Fermi

摘要

A problem that arises every time you have two particles is to know which forces act between them. Now the elementary particles whose existence is established are nine—as we have said.