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The Heavy Quarkonium Spectrum at Order mαs5 αs

N. Brambilla, A. Pineda, J. Soto, A. Vairo

hep-pharXiv:hep-ph/9910238

Abstract

We compute the complete leading-log terms of the next-to-next-to-next-to-leading-order corrections to potential NRQCD. As a by-product we obtain the leading logs at O(mαs5) in the heavy quarkonium spectrum. These leading logs, when ΛQCD mαs2, give the complete O(mαs5 αs) corrections to the heavy quarkonium spectrum.

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