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arxiv: 1401.6924 · v2 · pith:256JUFNLnew · submitted 2014-01-27 · ✦ hep-th · hep-ph

Where Have All the Goldstone Bosons Gone?

classification ✦ hep-th hep-ph
keywords gaugebosonsgoldstonenambu-goldstoneparticlestheoriesviewaccording
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According to a commonly held view of spontaneously broken symmetry in gauge theories, troublesome Nambu-Goldstone bosons are effectively eliminated by turning into longitudinal modes of a massive vector meson. This note shows that this is not in fact a consistent view of the role of Nambu-Goldstone bosons in such theories. These particles necessarily appear as gauge excitations whenever they are formulated in a manifestly covariant gauge. The radiation gauge provides therefore the dual advantage of circumventing the Goldstone theorem and making evident the disappearance of these particles from the physical spectrum.

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