Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2001-03-14
Phys.Lett. B507 (2001) 327-335
Physics
High Energy Physics
High Energy Physics - Phenomenology
10 pages, LaTeX
Scientific paper
10.1016/S0370-2693(01)00468-3
We investigate the so-called ``Kaluza-Klein regularisation'' procedure in supersymmetric extensions of the standard model with additional compact dimensions and Scherk-Schwarz mechanism for supersymmetry breaking. This procedure uses a specific mathematical manipulation to obtain a finite result for the scalar potential. By performing the full calculation, we show that the finiteness of this result is not only a consequence of the underlying supersymmetry, but also the result of an implicit fine-tuning of the coefficients of the terms that control the ultraviolet behaviour. The finiteness of the Higgs mass at one-loop level seems therefore to be an artefact of the regularisation scheme, and quadratic divergences are expected to reappear in higher orders of perturbation theory.
Ghilencea Dumitru
Nilles Hans Peter
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