Perturbative heavy quarkonium spectrum at next-to-next-to-next-to-leading order
Perturbative heavy quarkonium spectrum at next-to-next-to-next-to-leading order
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DOI:
10.1016/j.physletb.2014.01.030
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发表时间:
2013-09
影响因子:
4.4
通讯作者:
Y. Kiyo;Y. Sumino
中科院分区:
文献类型:
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作者:
Y. Kiyo;Y. Sumino
We compute the energy levels of some of the lower-lying heavy quarkonium states perturbatively up to O (α s 5 m) and O (α s 5 m log α s). 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.