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  • One-loop corrections to the...
    Berezhnoy, A. V.; Belov, I. N.; Poslavsky, S. V.; Likhoded, A. K.

    Physical review. D, 08/2021, Letnik: 104, Številka: 3
    Journal Article

    The cross sections of J/ψ ηc and J/ψ   J/ψ production in e+ e− annihilation are calculated at a one-loop accuracy near Z -boson pole and at higher energies as well. Both intermediate bosons, γ and Z , are included. It is found that at Z mass, the next-to-leading contribution increases the production cross sections by a factor of 3.5.