Processes ofe+e−→[η,η′,η(1295),η

Low-Energy Interactions of Mesons with Participation of the First Radially Excited States in U(3) × U(3) NJL Model

“…These predictions for future experiments can be tested at the e + e − colliders. The processes of electron-positron annihilation into η i γ meson pairs in the framework of the extended NJL model were described in [44]. The structure of the amplitudes of these processes is close to the processes e + e − → [π, π]γ considered above.…”

“…φ can be found in [44]. The standard values for all masses and widths of mesons are taken from PDG [29].…”

The processes $e^{+}e^{-} \rightarrow K^{\pm} (K^{*\mp}(892), K^{*\mp}(1410))$ and $e^{+}e^{-} \rightarrow (η, η^{'}(958)) (ϕ(1020), ϕ(1680))$ in the extended Nambu-Jona-Lasinio model

“…In the present paper, it is shown that using these models one can successfully describe the meson production involving s-quarks. The Feynman diagrams of the reactions considered in this work have an anomal quark triangle like the processes described earlier: e + e − → π 0 (π 0 )γ [14], e + e − → π 0 ω [15], e + e − → π 0 ρ 0 [16], e + e − → η, η , η(1295), η(1475) γ [17].…”