Published October 1, 2005
| Version v1
Journal article
Goldstone boson counting in linear sigma models with chemical potential
Creators
- 1. Department of Theoretical Physics, Nuclear Physics Institute, 25068 Rez (Czech Republic)
Description
We analyze the effects of finite chemical potential on spontaneous breaking of internal symmetries within the class of relativistic field theories described by the linear sigma model. Special attention is paid to the emergence of 'abnormal' Goldstone bosons with a quadratic dispersion relation. We show that their presence is tightly connected to nonzero density of the Noether charges, and formulate a general counting rule. The general results are demonstrated on an SU(3)xU(1) invariant model with an SU(3)-sextet scalar field, which describes one of the color-superconducting phases of QCD
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.72.076002;
- arXiv
- arXiv:hep-ph/0508011v2;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 72
- Journal Issue
- 7
- Journal Page Range
- p. 076002-076002.10
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 37027737
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Descriptors DEI
- AXIOMATIC FIELD THEORY; COLOR MODEL; DENSITY; DISPERSION RELATIONS; GOLDSTONE BOSONS; POTENTIALS; QUANTUM CHROMODYNAMICS; RELATIVISTIC RANGE; SCALAR FIELDS; SIGMA MODEL; SU-3 GROUPS; SYMMETRY BREAKING; U-1 GROUPS; UNITARY SYMMETRY
- Descriptors DEC
- BOSON-EXCHANGE MODELS; BOSONS; COMPOSITE MODELS; ELEMENTARY PARTICLES; ENERGY RANGE; FIELD THEORIES; LIE GROUPS; MATHEMATICAL MODELS; PARTICLE MODELS; PERIPHERAL MODELS; PHYSICAL PROPERTIES; POSTULATED PARTICLES; QUANTUM FIELD THEORY; QUARK MODEL; SU GROUPS; SYMMETRY; SYMMETRY GROUPS; U GROUPS
Optional Information
- Notes
- (c) 2005 The American Physical Society