Geodesic
Regularization of propagators with background field and their logarithms in $4$-dimensions
Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 24, Tome 465 (2017), pp. 61-81 Cet article a éte moissonné depuis la source Math-Net.Ru

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We provide different attempts to regularize simultaneously background field dependent propagators and traces of their logarithms for quantum field models in $4$-dimensional euclidian space-time. As was shown in the literature, infinities in the trace of the logarithm and in higher order loop diagramms are of different nature and require different approaches in regularization. We argue that the trace of the loagarithm itself is a finite (w.r.t regularization parameter) quantity. While the correspondent divergence in the effective action arises from the measure of the functional integral imposed by some Ward-like identities. 
@article{ZNSL_2017_465_a4,
     author = {T. A. Bolokhov},
     title = {Regularization of propagators with background field and their logarithms in $4$-dimensions},
     journal = {Zapiski Nauchnykh Seminarov POMI},
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     year = {2017},
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     url = {http://geodesic.mathdoc.fr/item/ZNSL_2017_465_a4/}
}
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T. A. Bolokhov. Regularization of propagators with background field and their logarithms in $4$-dimensions. Zapiski Nauchnykh Seminarov POMI, Questions of quantum field theory and statistical physics. Part 24, Tome 465 (2017), pp. 61-81. http://geodesic.mathdoc.fr/item/ZNSL_2017_465_a4/

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