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Fluctuation instability of the Dirac Sea in quark models of strong interactions
- Source :
- Physics of Atomic Nuclei. 79:278-284
- Publication Year :
- 2016
- Publisher :
- Pleiades Publishing Ltd, 2016.
-
Abstract
- A number of exactly integrable (quark) models of quantum field theory that feature an infinite correlation length are considered. An instability of the standard vacuum quark ensemble, a Dirac sea (in spacetimes of dimension higher than three), is highlighted. It is due to a strong ground-state degeneracy, which, in turn, stems from a special character of the energy distribution. In the case where the momentumcutoff parameter tends to infinity, this distribution becomes infinitely narrow and leads to large (unlimited) fluctuations. A comparison of the results for various vacuum ensembles, including a Dirac sea, a neutral ensemble, a color superconductor, and a Bardeen–Cooper–Schrieffer (BCS) state, was performed. In the presence of color quark interaction, a BCS state is unambiguously chosen as the ground state of the quark ensemble.
- Subjects :
- Physics
Nuclear and High Energy Physics
Top quark
High Energy Physics::Lattice
QCD vacuum
Down quark
Top quark condensate
01 natural sciences
Bottom quark
Atomic and Molecular Physics, and Optics
010305 fluids & plasmas
symbols.namesake
Quark star
Quantum electrodynamics
0103 physical sciences
Up quark
symbols
010306 general physics
Dirac sea
Subjects
Details
- ISSN :
- 1562692X and 10637788
- Volume :
- 79
- Database :
- OpenAIRE
- Journal :
- Physics of Atomic Nuclei
- Accession number :
- edsair.doi...........1f5935d65290be435b4d22877400245c