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Abstract
In this paper we provide strong evidence that there is no ambiguity in the choice of the horizon function underlying the Gribov–Zwanziger action. We show that there is only one correct possibility which is determined by the requirement of multiplicative renormalizability. As a consequence, this means that relations derived from other horizon functions cannot be given a consistent interpretation in terms of a local and renormalizable quantum field theory. In addition, we also discuss that the Kugo–Ojima functions u(p2) and w(p2) can only be defined after renormalization of the underlying Green function(s).
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1 Department of Physics and Astronomy, Ghent University, Gent, Belgium
2 Departamento de Física Teórica, Instituto de Física, UERJ—Universidade do Estado do Rio de Janeiro, Maracanã, Rio de Janeiro, Brasil





