The theorem lays out two possibilities. Some particles change phase by +1 when you rotate one by 360° or switch two of them. These are called bosons. They include photons, the W and Z boson, and gluons. Others change phase by -1 when you rotate one by 360° or switch two of them. These are called fermions. They include protons, neutrons, electrons and neutrinos.
— Spin, Statistics, CPT and All That Jazz
— John Baez
2010.07.02 Friday ACHK
Physics Town 