Thermal operator and cutting rules at finite temperature and chemical potential
Journal Article
·
· Physical Review. D, Particles Fields
- Instituto de Fisica, Universidade de Sao Paulo, Sao Paulo (Brazil)
- Department of Physics and Astronomy, University of Rochester, Rochester, New York 14627-0171 (United States)
- Departamento de Fisica, Universidad Tecnica Federico Santa Maria, Casilla 110-V, Valparaiso (Chile)
- Departamento de Fisica, Universidade Federal do Para, Belem, Para 66075-110 (Brazil)
In the context of scalar field theories, both real and complex, we derive the cutting description at finite temperature (with zero/finite chemical potential) from the cutting rules at zero temperature through the action of a simple thermal operator. We give an alternative algebraic proof of the largest time equation which brings out the underlying physics of such a relation. As an application of the cutting description, we calculate the imaginary part of the one-loop retarded self-energy at zero/finite temperature and finite chemical potential and show how this description can be used to calculate the dispersion relation as well as the full physical self-energy of thermal particles.
- OSTI ID:
- 20871434
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 74, Issue 8; Other Information: DOI: 10.1103/PhysRevD.74.085006; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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