Bose-Einstein statistics, class of statistics that applies to elementary particles called bosons, which include the photon , pion , and the W and Z particles . Bosons have integral values of the quantum mechanical property called spin and are
gregariousin the sense that an unlimited number of bosons can be placed in the same state. All of the particles that mediate the fundamental forces of nature are bosons. See elementary particles ; Fermi-Dirac statistics ; statistical mechanics .
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