Forward scattering amplitudes and the thermal operator representation
arXiv:hep-th/0609156 · doi:10.1103/PhysRevD.74.125005
Abstract
We develop systematically to all orders the forward scattering description for retarded amplitudes in field theories at zero temperature. Subsequently, through the application of the thermal operator, we establish the forward scattering description at finite temperature. We argue that, beyond providing a graphical relation between the zero temperature and the finite temperature amplitudes, this method is calculationally quite useful. As an example, we derive the important features of the one loop retarded gluon self-energy in the hard thermal loop approximation from the corresponding properties of the zero temperature amplitude.
16 pages, 6 figures
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Cited by in corpus (6)
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- Hard thermal effective action in QCD through the thermal operator
- Classical Boltzmann equation and high-temperature QED
- On kinetic theories with color and spin from amplitudes
- Thermal Operator and Dispersion Relation in QED at Finite Temperature and Chemical Potential