TL;DR: In this paper, a systematic study is made of the non-perturbative effects in quantum chromodynamics, where the basic object is the two-point functions of various currents and the terms of this series are shown to be of two distinct types.
TL;DR: In this article, the dispersion charmonium theory was extended to include power terms due to the nonperturbative effects of QCD, and an estimate for the gluonic vacuum expectation value was derived.
TL;DR: In this article, the theoretical basis and applications of the QCD sum rules invented by Shifman, Vainshtein, and Zakharov are reviewed, as well as their applications in hadronic physics.
TL;DR: The framework is a holographic version of the QCD sum rules, motivated by the anti-de Sitter/conformal field theory correspondence, and naturally incorporates properties of QCD dictated by chiral symmetry.
Abstract: We propose a five-dimensional framework for modeling low-energy properties of QCD. In the simplest three parameter model we compute masses, decay rates and couplings of the lightest mesons. The model fits experimental data to within 10%. The framework is a holographic version of the QCD sum rules, motivated by the anti-de Sitter/conformal field theory correspondence. The model naturally incorporates properties of QCD dictated by chiral symmetry, which we demonstrate by deriving the Gell-Mann-Oakes-Renner relationship for the pion mass.
TL;DR: In this article, the authors review the current status of heavy-quark symmetry and its applications to weak decays of hadrons containing a single heavy quark, including a comprehensive treatment of symmetry breaking corrections.