On fixed points and fermion mass structure from large extra dimensions

Details On fixed points and fermion mass structure from large extra dimensions On fixed points and fermion mass structure from large extra dimensions

1998-09-21

arxiv.org/abs/hep-ph/9809467v1

Phys.Rev.D59:095010,1999

Physics

High Energy Physics

High Energy Physics - Phenomenology

17 Pages plain latex; includes 3 postscript figures

Scientific paper

10.1103/PhysRevD.59.095010

We examine the fixed point behaviour of Yukawa couplings in supersymmetric theories with varying numbers of dimensions. We show that Pendleton-Ross fixed point behaviour is greatly amplified in the MSSM with no extra dimensions and 4 extra $5+\bar{5}$ multiplets or the MSSM with one extra large dimension and 3 extra $5+\bar{5}$ multiplets. We also show that power law running in models with large extra dimensions can give a hierarchical set of quasi-fixed points for the Yukawa couplings in a manner which is similar to the Froggatt-Nielsen mechanism. However, we also point out the limited perturbative domain in models with power law running

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