arXiv:1002.4490·v2·High Energy Physics — Phenomenology
Symmetry preserving regularization with a cutoff
G. Cynolter🇭🇺 · E. Lendvai🇭🇺
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.
Comments: 12 pages, 1 figure, v2 references added