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arXiv 1002.4490hep-phnucl-th
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带截断的对称保持正则化

Symmetry preserving regularization with a cutoff

G. Cynolter, E. Lendvai

摘要:

提出了一种基于动量截断的四维洛伦兹和规范对称性保持正则化方法。我们使用规范不变性或环动量自由移动的条件来定义携带洛伦兹指数的项的计算,例如与k_μk_v成比例。其余的标量积分计算与四维动量截断。有限项(与截断无关)是明确的,并与维数正则化的结果一致。

英文摘要:

A Lorentz and gauge symmetry preserving regularization method is proposed in 4 dimension based on momentum cutoff. We use the conditions of gauge invariance or freedom of shift of the loop-momentum to define the evaluation of the terms carrying Lorentz indices, e.g. proportional to k_μk_ν. The remaining scalar integrals are calculated with a four dimensional momentum cutoff. The finite terms (independent of the cutoff) are unambiguous and agree with the result of dimensional regularization.

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