Matching heavy-quark fields in QCD and HQET at three loops
Matching heavy-quark fields in QCD and HQET at three loops
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三环 QCD 和 HQET 中的重夸克场匹配
DOI:
10.1016/j.physletb.2010.07.032
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发表时间:
2010
影响因子:
4.4
通讯作者:
A. Grozin
中科院分区:
文献类型:
--
作者:
A. Grozin
The relation between the heavy-quark field in QCD and the corresponding field in HQET is derived up to three loops, and to all orders in the large-β0limit. The corresponding relation between the QED electron field and the Bloch–Nordsieck one is gauge invariant to all orders. We also prove that the MS¯ anomalous dimension of the QED electron field depends on the gauge parameter only at one loop.