Where have all the Goldstone bosons gone?
Abstract
According to a commonly held view of spontaneously broken symmetry in gauge theories, troublesome NambuGoldstone 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 NambuGoldstone 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.
 Publication:

Modern Physics Letters A
 Pub Date:
 March 2014
 DOI:
 10.1142/S0217732314500461
 arXiv:
 arXiv:1401.6924
 Bibcode:
 2014MPLA...2950046G
 Keywords:

 02.20.a;
 03.65.Fd;
 02.20.Sv;
 03.65.w;
 Group theory;
 Algebraic methods;
 Lie algebras of Lie groups;
 Quantum mechanics;
 High Energy Physics  Theory;
 High Energy Physics  Phenomenology
 EPrint:
 4 pages