L.J. Reinders

TL;DR: In this article, a detailed and coherent work on QCD sum rules for equal mass heavy quark meson states is presented, and the technical procedures used to calculate the perturbative and non-perturbative contributions to the vacuum polarization, which have been calculated for all currents up to and including spin 2++.

TL;DR: Using the Borel transformed QCD sum rule formalism, the masses of L = 1 light quark mesons with isospin I = 1 and I = 0 were calculated in this paper.

TL;DR: In this paper, the coupling constants in QCD were derived by extrapolating from the asymptotic freedom regime using QCD sum rules, where the amplitudes are dominated by the quark condensate when one leg is a pseudoscalar Goldstone boson.

TL;DR: In this article, the perturbative and non-perturbative contributions to the vacuum polarization from the pseudoscalar current in the unequal mass case were computed to first order in α s.

TL;DR: In this article, the authors complete the calculations of two-point functions in QCD by presenting the results for the flavour changing vector current, including perturbative and non-perturbative contributions (to first order in αs).