Physics – High Energy Physics – High Energy Physics - Theory
Scientific paper
1999-06-08
Phys.Rev.D61:025019,2000
Physics
High Energy Physics
High Energy Physics - Theory
21 pages, LaTeX, 6 figures. Minor clarifications, references added
Scientific paper
10.1103/PhysRevD.61.025019
We examine a class of gauge theories obtained by projecting out certain fields from an N=4 supersymmetric SU(N) gauge theory. These theories are non-supersymmetric and in the large N limit are known to be conformal. Recently it was proposed that the hierarchy problem could be solved by embedding the standard model in a theory of this kind with finite N. In order to check this claim one must find the conformal points of the theory. To do this we calculate the one-loop beta functions for the Yukawa and quartic scalar couplings. We find that with the beta functions set to zero the one-loop quadratic divergences are not canceled at sub-leading order in N; thus the hierarchy between the weak scale and the Planck scale is not stabilized unless N is of the order 10^28 or larger. We also find that at sub-leading orders in N renormalization induces new interactions, which were not present in the original Lagrangian.
Csa'ki Csaba
Skiba Witold
Terning John
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