The flavor puzzle in multi-Higgs models

Details The flavor puzzle in multi-Higgs models The flavor puzzle in multi-Higgs models

2010-09-08

arxiv.org/abs/1009.1612v2

JHEP 1011:075,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, typos are corrected, references are added, the final version

Scientific paper

10.1007/JHEP11(2010)075

We reconsider the flavor problem in the models with two Higgs doublets. By studying two generation toy models, we look for flavor basis independent constraints on Yukawa couplings that will give us the mass hierarchy while keeping all Yukawa couplings of the same order. We then generalize our findings to the full three generation Standard Model. We find that we need two constraints on the Yukawa couplings to generate the observed mass hierarchy, and a slight tuning of Yukawa couplings of order 10%, much less than the Standard Model. We briefly study how these constraints can be realized, and show how flavor changing currents are under control for $K-\bar{K}$ mixing in the near-decoupling limit.

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