Radiative Corrections as the Origin of Spontaneous Symmetry Breaking

Sidney Coleman and Erick Weinberg
Phys. Rev. D 7, 1888 – Published 15 March 1973
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We investigate the possibility that radiative corrections may produce spontaneous symmetry breakdown in theories for which the semiclassical (tree) approximation does not indicate such breakdown. The simplest model in which this phenomenon occurs is the electrodynamics of massless scalar mesons. We find (for small coupling constants) that this theory more closely resembles the theory with an imaginary mass (the Abelian Higgs model) than one with a positive mass; spontaneous symmetry breaking occurs, and the theory becomes a theory of a massive vector meson and a massive scalar meson. The scalar-to-vector mass ratio is computable as a power series in e, the electromagnetic coupling constant. We find, to lowest order, m2(S)m2(V)=(32π)(e24π). We extend our analysis to non-Abelian gauge theories, and find qualitatively similar results. Our methods are also applicable to theories in which the tree approximation indicates the occurrence of spontaneous symmetry breakdown, but does not give complete information about its character. (This typically occurs when the scalar-meson part of the Lagrangian admits a greater symmetry group than the total Lagrangian.) We indicate how to use our methods in these cases.

  • Received 8 November 1972


©1973 American Physical Society

Authors & Affiliations

Sidney Coleman and Erick Weinberg

  • Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138

Comments & Replies

Remarks on spontaneous mass generation

Y. Frishman, H. Römer, and S. Yankielowicz
Phys. Rev. D 11, 3040 (1975)

Gauge-invariant content of the effective potential

J. -M. Frère and P. Nicoletopoulos
Phys. Rev. D 11, 2332 (1975)

Comment on the computation of effective potentials

Abdus Salam and J. Strathdee
Phys. Rev. D 9, 1129 (1974)

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Vol. 7, Iss. 6 — 15 March 1973

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