Energy dependence of the cross sections for the e+e– → hadrons process near the production threshold for the NN̄ pair

Abstract

The energy dependence of the cross sections for the processes e⁺e⁻ → π⁺π⁻π⁰, K⁺K⁻, ηπ⁺π⁻, ωπ₀, and K⁺K⁻π⁺π⁻ is studied near the production threshold for a nucleon–antinucleon pair. It is shown that, within the measurement errors, the cross sections in question behave smoothly in this energy region.