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Weak Coupling Limit and Genuine QCD Predictions for Heavy Quarkonia

W. Kummer·W. Moedritsch
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Abstract

Although individual levels of toponium will be unobservable, the top--anti--top system near threshold fulfills all requirements of a rigorous perturbation theory in QCD for weakly bound systems. Corresponding techniques from positronium may thus be transferred successfully to this case. After clarifying the effect of a non-zero width we calculate the $t\bar{t}$ potential to be used for the calculation of e.g. the cross-sections near threshold.

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W. Kummer, W. Moedritsch. 1994-08-03. Weak Coupling Limit and Genuine QCD Predictions for Heavy Quarkonia. https://arxiv.org/abs/hep-ph/9408220

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