We compute the energy levels of some of the lower-lying heavy quarkonium states perturbatively up to O(αs5m) and O(αs5mlogαs). Stability of the predictions depends crucially on the unknown 4-loop pole- MS- mass relation. We discuss the current status of the predictions with respect to the observed bottomonium spectrum.
|Number of pages||5|
|Journal||Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics|
|Publication status||Published - 2014 Mar 7|
ASJC Scopus subject areas
- Nuclear and High Energy Physics