Unification and fermion mass relations in low string scale D-brane models
Abstract
In this talk, gauge coupling evolution is analyzed in D-brane inspired models with two Higgs doublets and a U(3)xU(2)xU(1)^N gauge symmetry. In particular, we focus on D-brane configurations with two or three abelian factors. We find that the correct hypercharge assignment of the Standard Model particles is reproduced for six viable models distinguished by different brane configurations. We also investigate the bottom tau quark mass relation and find that the correct low energy m_b / m_\tau ratio is obtained for equal b-\tau Yukawa couplings at a string scale around 10^3 TeV.
Cite
@article{arxiv.hep-ph/0605278,
title = {Unification and fermion mass relations in low string scale D-brane models},
author = {D. V. Gioutsos},
journal= {arXiv preprint arXiv:hep-ph/0605278},
year = {2015}
}
Comments
10 pages, 3 figures. Talk presented at the ``Corfu Summer Institute'', Corfu-Greece, September 4-14, 2005. To appear in the proceedings of RTN workshop on the Quest for Unification Theory Confronts Experiment