We investigate a class of extra dimensional models where all of the Standard Model fermions are localized to a single fixed point in an S1/Z2 orbifold, and each species is localized with an exponential wavefunction with a different width. We show that this naturally generates Yukawa hierarchies of the size present in the Standard Model, and we find a set of model parameters that reproduces the observed masses and mixings to experimental accuracy. In addition, the dominant constraints, arising from flavor changing neutral currents, are shown to restrict the compactification scale to be 1/R geq 2-5TeV, which is a much less stringent constraint than in similar extra dimensional models of the Yukawa hierarchy.
Journal of High Energy Physics
- Pub Date:
- December 2003
- Quark Masses and SM Parameters Beyond Standard Model Compactification and String Models;
- High Energy Physics - Phenomenology
- 23 pages, 6 figures, typo fixed, added refs