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arXiv · 1002.4490

Symmetry preserving regularization with a cutoff

G. Cynolter·E. Lendvai
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Abstract

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_{\mu}k_{\nu}. 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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G. Cynolter, E. Lendvai. 2010-02-24. Symmetry preserving regularization with a cutoff. https://doi.org/10.2478/s11534-011-0039-y

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