Spontaneous Symmetry Breaking with Abnormal Number of Nambu-Goldstone Bosons and Kaon Condensate
Abstract
We describe a class of relativistic models incorporating a finite density of matter in which spontaneous breakdown of continuous symmetries leads to a lesser number of Nambu-Goldstone bosons than that required by the Goldstone theorem. This class, in particular, describes the dynamics of the kaon condensate in the color-flavor locked phase of high density QCD. We describe the spectrum of low energy excitations in this dynamics and show that, despite the presence of a condensate and gapless excitations, this system is not a superfluid.
- Publication:
-
Physical Review Letters
- Pub Date:
- March 2002
- DOI:
- 10.1103/PhysRevLett.88.111601
- arXiv:
- arXiv:hep-ph/0108178
- Bibcode:
- 2002PhRvL..88k1601M
- Keywords:
-
- High Energy Physics - Phenomenology;
- Condensed Matter;
- High Energy Physics - Theory;
- Nuclear Theory
- E-Print:
- 5 pages, 1 figure, REVTeX. Minor revisions made and 2 new references added. To appear in Phys. Rev. Lett