"Coulomb+linear" form of the static QCD potential in operator-product-expansion
Abstract
The static QCD potential is analyzed in operator-product-expansion within potential-NRQCD framework when r << 1/LambdaQCD. We show that the leading short-distance contribution to the potential, defined as a perturbatively computable Wilson coefficient, can be expressed, up to O(r2), as a ``Coulomb+linear'' potential. It coincides with the ``Coulomb+linear'' potential obtained previously from the renormalon-dominance hypothesis. Non-perturbative contributions are of order r2 and subleading.
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