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most citedThree-loop renormalization of the quantum action for a five-dimensional scalar cubic model with the usage of the background field method and a cutoff regularization

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hep-th2025

Three-loop singularity structure for a non-linear sigma model

P. V. Akacevich, A. V. Ivanov, I. V. Korenev

The paper is devoted to the three-loop renormalization of the effective action for a two-dimensional non-linear sigma model using the background field method and a cutoff regulariz…