Text: "Guage theories." Guage invariance implies that, to exist, an electron must interact with a massless vector particle. Proceedings of the 1981 CERN-JINR School of Physics. Hanko, Finland, June 6-19 1981. CERN, Geneva, 1982. p. 67-69.

See Also: photons, charged particles, electromagnetic fields, foundations of physics.

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