Potential NRQCD: an effective theory for heavy quarkonium

Details Potential NRQCD: an effective theory for heavy quarkonium Potential NRQCD: an effective theory for heavy quarkonium

1999-07-05

arxiv.org/abs/hep-ph/9907240v2

Nucl.Phys. B566 (2000) 275

Physics

High Energy Physics

High Energy Physics - Phenomenology

39 pages, LaTeX, 12 figures. Journal version. Some explanatory remarks and references added

Scientific paper

Within an effective field theory framework we study heavy-quark--antiquark systems with a typical distance between the heavy quark and the antiquark smaller than $1/\Lambda_{\rm QCD}$. A suitable definition of the potential is given within this framework, while non-potential (retardation) effects are taken into account in a systematic way. We explore different physical systems. Model-independent results on the short distance behavior of the energies of the gluonic excitations between static quarks are obtained. Finally, we show how infrared renormalons affecting the static potential get cancelled in the effective theory.

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