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Coefficients at powers of logarithms in the HD+MSL renormalization scheme

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arxiv 2208.13443 v2 pith:O7ZZK7XT submitted 2022-08-29 hep-th

classification hep-th
keywords renormalizationpowerscoefficientsconstantconstantslogarithmscasecoupling
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

For renormalizable theories with a single coupling constant regularized by higher derivatives we investigate the coefficients at powers of logarithms present in the renormalization constants assuming that divergences are removed by minimal subtractions of logarithms. According to this (HD+MSL) renormalization prescription the renormalization constants include only powers of $\ln\Lambda/\mu$, where $\Lambda$ and $\mu$ are the dimensionful regularization parameter and the renormalization point, respectively. We construct general explicit expressions for arbitrary coefficients at powers of this logarithm present in the coupling constant renormalization and in the field renormalization constant which relate them to the $\beta$-function and (in the latter case) to the corresponding anomalous dimension. To check the correctness, we compare the results with the explicit four-loop calculation made earlier for ${\cal N}=1$ SQED and (for the supersymmetric case) rederive a relation between the renormalization constants following from the NSVZ equation.

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