Ionescu, DC; Reinhardt, J; Muller, B; Greiner, W; Soff, G, *Nonlinear interactions and poly-positronium bound states*,
Journal of Physics G: Nuclear Physics, vol. 14 no. 6
(1988),
pp. L143-L152 [doi] .
**Abstract:**

*The creation of a hypothetical many-electron-positron bound system was suggested as a possible source of the correlated peaks observed in the e + and e- spectra of various heavy-ion collisions. A new electron-electron interaction was assumed, which becomes large in high-Z nuclear collisions. The authors investigate energy states of such (e+e -)n clusters, bound by scalar and vector Fermi-type interactions. For the bi-positronium system (e+e-) 2 they derive a single-particle equation employing the Hartree-Fock method. The required values of the coupling constants are found to be inconsistent with precision QED experiments.*