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Phys. Rev. Lett. 12, 266–268 (1964)

Does Spontaneous Breakdown of Symmetry Imply Zero-Mass Particles?

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Abraham Klein and Benjamin W. Lee*
Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania

Received 8 January 1964; published in the issue dated 9 March 1964

© 1964 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.12.266
DOI:
10.1103/PhysRevLett.12.266
PACS:

*Alfred P. Sloan Foundation Fellow.