arXiv 1102.37722011-02-18hep-th

Derivation of the exact NSVZ beta-function in N=1 SQED, regularized by higher derivatives, by direct summation of Feynman diagrams

K. V. Stepanyantz

备注：: 38 pages
发表信息：: Nucl.Phys.B852:71-107,2011
DOI：: 10.1016/j.nuclphysb.2011.06.018

英文摘要：

For N=1 supersymmetric quantum electrodynamics, regularized by higher derivatives, a method for summation of all Feynman diagrams defining the beta-function is presented. Using this method we prove that the beta-function is given by an integral of a total derivative, which can be easily calculated. It is shown that surviving terms give the exact NSVZ beta-function. The results are compared with the explicit three-loop calculation.

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