Pion spectral properties above the chiral crossover of QCD

  title={Pion spectral properties above the chiral crossover of QCD},
  author={Peter Lowdon and Owe Philipsen},
  journal={Journal of High Energy Physics},
Spectral functions encode a wealth of information about the dynamics of any given system, and the determination of their non-perturbative characteristics is a long-standing problem in quantum field theory. Whilst numerical simulations of lattice QCD provide ample data for various Euclidean correlation functions, the inversion required to extract spectral functions is an ill-posed problem. In this work, we pursue previously established constraints imposed by field locality at finite temperature… 

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