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arXiv · 1309.6571

Perturbative heavy quarkonium spectrum at next-to-next-to-next-to-leading order

Y. Kiyo·Y. Sumino
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Abstract

We compute the energy levels of some of the lower-lying heavy quarkonium states perturbatively up to O(alpha_s^5*m) and O(alpha_s^5*m*log[alpha_s]). Stability of the predictions depends crucially on the unknown 4-loop pole-MSbar mass relation. We discuss the current status of the predictions with respect to the observed bottomonium spectrum.

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Y. Kiyo, Y. Sumino. 2014-01-23. Perturbative heavy quarkonium spectrum at next-to-next-to-next-to-leading order. https://doi.org/10.1016/j.physletb.2014.01.030

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