Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2004-05-11
JHEP 0408 (2004) 010
Physics
High Energy Physics
High Energy Physics - Phenomenology
22 pages, LaTeX
Scientific paper
10.1088/1126-6708/2004/08/010
Any supersymmetric mechanism to solve the flavour puzzle would generate mixing both in the superpotential Yukawa couplings and in the Kahler potential. In this paper we study, in a model independent way, the impact of the nontrivial structure of the Kahler potential on the physical mixing matrix, after kinetic terms are canonically normalized. We undertake this analysis both for the quark sector and the neutrino sector. For the quark sector, and in view of the experimental values for the masses and mixing angles, we find that the effects of canonical normalization are subdominant. On the other hand, for the leptonic sector we obtain different conclusions depending on the spectrum of neutrinos. In the hierarchical case we obtain similar conclusion as in the quark sector, whereas in the degenerate and inversely hierarchical case, important changes in the mixing angles could be expected.
Espinosa Jose Ramon
Ibarra Aitor
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