The four-loop β-function from vacuum supergraphs and the NSVZ relation for N=1 SQED regularized by higher derivativesстатья
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Дата последнего поиска статьи во внешних источниках: 10 апреля 2024 г.
Аннотация:In N=1 SQED with Nf flavors regularized by higher derivatives we obtain the four-loop beta function using a method based on calculating vacuum supergraphs. For this purpose we use a special C++ program which obtain contributions to the β-function from supergraphs without external legs in the form of integrals of double total derivatives. After that the result was compared with the three-loop anomalous dimension calculated earlier. We explicitly check the NSVZ relation in this order.