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
期刊:
影响因子:
4.4
通讯作者:
Y. Kiyo;Y. Sumino
Y. Kiyo;Y. Sumino
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Y. Kiyo;Y. Sumino

文献摘要

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我们计算了一些较低的重夸克偶素态的能级,微扰达到O(α s 5 m)和O(α s 5 m log α s)。预测的稳定性主要取决于未知的4圈极点-MS ′质量关系。我们讨论了目前的状态的预测与观察到的bottomonium光谱。
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.