Thermal Operator and Cutting Rules at Finite Temperature and Chemical Potential

Details Thermal Operator and Cutting Rules at Finite Temperature and Chemical Potential Thermal Operator and Cutting Rules at Finite Temperature and Chemical Potential

2006-07-25

arxiv.org/abs/hep-th/0607196v2

Phys.Rev.D74:085006,2006

Physics

High Energy Physics

High Energy Physics - Theory

17 pages, 13 figures. Added references, version to appear in Physical Review D

Scientific paper

10.1103/PhysRevD.74.085006

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.

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