On the equivalence of regularization schemes ∗
نویسنده
چکیده
We illustrated via the sunset diagram that dimensional regularization ’deforms’ the nonlocal contents of multi-loop diagrams with its equivalence to cutoff 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 nonperturbative perspective. Work supported in part by the National Nature Science Foundation of China under Grant No. 10075020.
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