One-loop corrections to the processes $e^+e^- \to \gamma, Z \to J/\psi~\eta_c$ and $e^+e^- \to Z \to J/\psi~J/\psi$

A.K. Likhoded; A.V. Berezhnoy; I.N. Belov; S.V. Poslavsky

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One-loop corrections to the processes e^+e^- to γ, Z to J/psi~η_c and e^+e^- to Z to J/psi~J/psi

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arxiv 2101.01477 v3 pith:H7KZNXHZ submitted 2021-01-05 hep-ph

One-loop corrections to the processes e^+e^- to γ, Z to J/psi~η_c and e^+e^- to Z to J/psi~J/psi

A.V. Berezhnoy , I.N. Belov , S.V. Poslavsky , A.K. Likhoded This is my paper

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keywords gammaone-loopvaluesaccountannihilationapproximationbosonscontribution

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The cross section values of $J/\psi\ \eta_c$ and $J/\psi\ J/\psi$ production in $e^+e^-$ annihilation are estimated within one-loop approximation near $Z$ pole, as well as at higher energies. Both intermediate bosons, $\gamma$ and $Z$, are taken into account. It is shown that at $Z$ mass the NLO contribution increases the cross-section values by 3.5 times.

One-loop corrections to the processes e^+e^- to γ, Z to J/psi~η_c and e^+e^- to Z to J/psi~J/psi

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