Symmetry preserving regularization with a cutoff

Details Symmetry preserving regularization with a cutoff Symmetry preserving regularization with a cutoff

2010-02-24

arxiv.org/abs/1002.4490v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 1 figure, v2 references added

Scientific paper

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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