On two-loop effective action of 2d sigma model
نویسندگان
چکیده
Abstract In this paper, we study two-loop contribution to the effective action of a two-dimensional non-linear sigma model. We derive new formula, which can be applicable regularization general type. As examples, obtain known results for dimensional and investigate types cutoff one. Also, discuss non-local contributions restrictions on regularization.
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ژورنال
عنوان ژورنال: European Physical Journal C
سال: 2023
ISSN: ['1434-6044', '1434-6052']
DOI: https://doi.org/10.1140/epjc/s10052-023-11797-0