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 Q​​CD 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
期刊:
影响因子:
4.4
通讯作者:
A. Grozin
A. Grozin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
A. Grozin

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导出了QCD中的重夸克场与HQET中相应的场之间的关系,直到三圈,以及在大β 0极限下的所有阶。QED电子场与布洛赫-诺德西克电子场之间的对应关系对于所有阶都是规范不变的。我们还证明了QED电子场的MS ′反常维数仅在一个圈处依赖于规范参数。
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.