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Gauge coupling and fermion mass relations in low string scale brane models

  • D. V. GioutsosEmail author
  • G. K. Leontaris
  • J. Rizos
Theoretical Physics

Abstract.

We analyze the gauge coupling evolution in brane inspired models with U(3) x U(2) x U(1) N symmetry at the string scale. We restrict our work to the case of brane configurations with two and three abelian factors (N = 2,3) and where only one Higgs doublet is coupled to down quarks and leptons and only one to the up quarks. We find that the correct hypercharge assignment of the standard model particles is reproduced for six viable models distinguished by different brane configurations. We investigate the third generation fermion mass relations and find that the correct low energy m b/m τ ratio can be obtained for b-τ Yukawa coupling equality at a string scale as low as M S ~103 TeV.

Keywords

Gauge Coupling Particle Acceleration Coupling Equality Model Particle Higgs Doublet 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin/Heidelberg 2006

Authors and Affiliations

  1. 1.Theoretical Physics DivisionIoannina UniversityIoanninaGreece

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