Some aspects of the quark-antiquark Wilson loop formalism in the NRQCD framework
Nora Brambilla, Antonio Vairo
Abstract
Starting from the NRQCD Lagrangian the heavy quark-antiquark potential is written in terms of field strength insertions on a static Wilson loop. The relevant matching coefficients are given at the present status of knowledge. The short-range, perturbatively dominated, behaviour of the spin-dependent terms is discussed.
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