Abstract
There was a general belief that the nucleon QCD sum rules which include only the quark loops and thus contain only the condensates of dimension d = 3 and d = 4 have only a trivial solution. We demonstrate that there is also a nontrivial solution. We show that it can be treated as the lowest order approximation to the solution which includes the higher terms of the Operator Product Expansion. Inclusion of the radiative corrections improves the convergence of the series.
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Original Russian Text © E.G. Drukarev, M.G. Ryskin, V.A. Sadovnikova, 2015, published in Yadernaya Fizika, 2015, Vol. 78, No. 10, pp. 903–908.
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Drukarev, E.G., Ryskin, M.G. & Sadovnikova, V.A. On the loop approximation in nucleon QCD sum rules. Phys. Atom. Nuclei 78, 849–853 (2015). https://doi.org/10.1134/S1063778815070054
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DOI: https://doi.org/10.1134/S1063778815070054