2 papers
hep-ph1995
The Plasmon in Hot Theory
Enke Wang, Ulrich Heinz
We study the 2-loop resummed propagator in hot theory. The propagator has a cut along the whole real axis in the complex energy plane, but for small , the spectral dens…
hep-ph1995
Spectral functions for composite fields and viscosity in hot scalar field theory
Enke Wang, Xiaofei Zhang, Ulrich Heinz
We derive a spectral representation for the two-point Green function for arbitrary composite field operators in Thermo Field Dynamics (TFD). A simple way for calculating the spectr…