Forward-backward asymmetry in e⁺e^- annihilation into pions or kaons revisited

2020/03/31 by A. B. Arbuzov, Arbuzov, A. B., T. V. Kopylova +3
Physics and Astronomy · #Quantum Chromodynamics and Particle Interactions #Particle physics theoretical and experimental studies #High-Energy Particle Collisions Research

paper · pdf · doi:10.48550/arxiv.2003.14054

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.

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