Abstract
The parity-violating pion-nucleon coupling constant for the neutral currents of electroweak interaction is calculated by the method of QCD sum rules. In doing this, operators up to dimension 5 are retained in the operator-product expansion for the correlation function in an external pion field. That the value obtained for the pion-nucleon coupling constant is comparatively small stems from a partial cancellation between the leading perturbative and condensate contributions. This constant is compared with experimental data and with the results of calculations performed by other authors.
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Translated from Yadernaya Fizika, Vol. 65, No. 3, 2002, pp. 561–565.
Original Russian Text Copyright © 2002 by Lobov.
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Lobov, G.A. Electroweak pion-nucleon constant. Phys. Atom. Nuclei 65, 534–538 (2002). https://doi.org/10.1134/1.1465493
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DOI: https://doi.org/10.1134/1.1465493