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Stochastic vacuum model and dual theory: a comparison in the context of the heavy quarkonia potential
N. Brambilla, A. Vairo
The semirelativistic interaction in QCD can be expressed in terms of the Wilson loop and its functional derivatives. In this framework we discuss the complete (velocity…
Gauge invariance on bound state energy levels
A. Vairo
In this paper the problem of the gauge in a bound state calculation is discussed. In particular, in order to verify the gauge invariance in the energy levels expansion, some set of…
Nonperturbative evaluation of a field correlator appearing in the heavy quarkonium system
M. Baker, J. S. Ball, N. Brambilla +1
Recently an electric and magnetic field correlator appearing in the description of the heavy quarkonium system was evaluated on the lattice. Here, we give a nonperturbative analyti…
Heavy Quarkonia: Wilson Area Law, Stochastic Vacuum Model and Dual QCD
N. Brambilla, A. Vairo
The semirelativistic interaction in QCD can be simply expressed in terms of the Wilson loop and its functional derivatives. In this approach we present the …
QCD Box Graphs and the Quark-Antiquark Potential
W. Kummer, W. Moedritsch, A. Vairo
The system allows a truly perturbative treatment of the potential. Completing previous computations, we calculate the contributions of QCD box graph corrections, which m…