O(4) symmetric singular solutions and multiparticle cross sections in $ϕ^4$ theory at tree level

2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202672We solve the classical euclidean boundary value problem for tree-level multiparticle production in $ϕ^4$ theory at arbitrary energies in the case of $O(4)$ symmetric field configurations. We reproduce known low-energy results and obtain a lower bound on the tree cross sections at arbitrary energies.LaTeX, 9pp + 2 Postscript figures, tar-compressed and uuencoded using uufiles; minor Postscript bug fixedHigh Energy Physics - PhenomenologyO(4) symmetric singular solutions and multiparticle cross sections in $ϕ^4$ theory at tree leveltext