Reconstructing the gluon

  title={Reconstructing the gluon},
  author={Anton K. Cyrol and Jan M. Pawlowski and Alexander Rothkopf and Nicolas Wink},
We reconstruct the gluon spectral function in Landau gauge QCD from numerical data for the gluon propagator. The reconstruction relies on two novel ingredients: Firstly we derive analytically the low frequency asymptotics of the spectral function. Secondly we construct a functional basis from a careful consideration of the analytic properties of the gluon propagator in Landau gauge. This allows us to reliably capture the non-perturbative regime of the gluon spectrum. We also compare different… CONTINUE READING
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