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Forward–backward asymmetry in electron–positron annihilation into pion or kaon pairs revisited

Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Joliot-Curie Str. 6, Dubna 141980, Russia

Department of Higher Mathematics, Dubna State University, Universitetskaya Str. 19, Dubna 141980, Russia

E-mail Address: arbuzov@theor.jinr.ru

Corresponding author.

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Tatiana V. Kopylova

Department of Higher Mathematics, Dubna State University, Universitetskaya Str. 19, Dubna 141980, Russia

E-mail Address: tv-kopylova@mail.ru

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, and

Gulnazym A. Seilkhanova

Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Joliot-Curie Str. 6, Dubna 141980, Russia

E-mail Address: seilkhanova.ga@gmail.com

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https://doi.org/10.1142/S0217732320502107Cited by:6 (Source: Crossref)

Abstract

Forward–backward (charge) asymmetry in the processes of $e^{+} e^{-}$ annihilation into a pair of charged pseudoscalar mesons is recalculated in the one-loop approximation. The exact dependence on the meson masses is taken into account. Results known in the literature are partially corrected. The bulk of the charge asymmetry appears due to double-photon exchange in $s$ channel. Experimental studies of the asymmetry can be used to verify the point-like approximation used in calculation of radiative corrections due to emission of photons by pions or kaons.

Keywords:

PACS: 13.40.-f, 13.66.Bc, 12.20.-m

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