The Role of the Qcd Vacuum in the Heavy-quark Bound State Dynamics A
نویسنده
چکیده
It is well known that the complex structure of the QCD vacuum can, in some regimes, be parametrized by local vacuum condensates, i.e. the expectation values of operators where all the perturbative vacuum fluctuations are taken out at the best of our ability . The first attempt to calculate the effect of non-perturbative vacuum condensates on the energy levels of heavy quarkonia was performed in . The leading contribution (in αs and ΛQCD, the scale of non-perturbative physics) of the vacuum condensates to Coulombic n, l heavy quarkonium states reads :
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