Finite temperature spectral functions in the O(N)-model

@inproceedings{Pawlowski2018FiniteTS,
  title={Finite temperature spectral functions in the O(N)-model},
  author={Jan M. Pawlowski and Nils Strodthoff and Nicolas Wink},
  year={2018}
}
We directly calculate spectral functions in the O(N)-model at finite temperature within the framework of the Functional Renormalization group. Special emphasis is put on a fully numerical framework involving four-dimensional regulators preserving Euclidean O(4) and Minkowski Lorentz invariance, an important prerequisite for future applications. Pion and sigma meson spectral functions are calculated for a wide range of temperatures across the phase transition illustrating the applicability of… CONTINUE READING