Yukawa hierarchy from extra dimensions and infrared fixed points

Details Yukawa hierarchy from extra dimensions and infrared fixed points Yukawa hierarchy from extra dimensions and infrared fixed points

2000-02-09

arxiv.org/abs/hep-ph/0002102v2

Phys.Lett. B480 (2000) 187-192

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 eps figures

Scientific paper

10.1016/S0370-2693(00)00366-X

We discuss the existence of hierarchy of Yukawa couplings in the models with extra spatial dimensions. The hierarchical structure is induced by the power behavior of the cutoff dependence of the evolution equations which yield large suppressions of couplings at the compactification scale. The values of coupling constants at this scale can be made stable almost independently of the initial input parameters by utilizing the infrared fixed point. We find that the Yukawa couplings converge to the fixed points very quickly because of the enhanced energy dependence of the suppression factor from extra dimensions as well as in the case of large gauge couplings at high-energy scale.

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