"Quantum electrodynamics is studied analytically in a quenched, planar approximation in four dimensions. At sufficiently strong coupling, chiral symmetry is broken spontaneously and the corresponding pseudoscalar Goldstone boson is observed. This phase of the theory is governed by a novel ultraviolet fixed point which requires the mixing of four-fermion interactions with the electrodynamic interactions."
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Original Language: English
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C. N. Leung, S. T. Love, and William A. Bardeen:
https://en.wikiquote.org/wiki/Spontaneous_symmetry_breaking
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Spontaneous symmetry breaking
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