On the equivalence of regularization schemes

Details On the equivalence of regularization schemes On the equivalence of regularization schemes

2001-11-25

arxiv.org/abs/hep-ph/0111321v4

Commun.Theor.Phys. 38 (2002) 317-321

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, LaTex, no figure, revised version, new style,to appear in Comm.Theor.Phys

Scientific paper

We illustrated via the sunset diagram that dimensional regularization 'deforms' the nonlocal contents of multi-loop diagrams with its equivalence to cut-off regularization scheme recovered only after sub-divergence were subtracted. Then we employed a differential equation approach for calculating loop diagrams to verify that dimensional regularization deformed the 'low energy' contents before subtraction. The virtues of the differential equation approach were argued especially in non-perturbative perspective.

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