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Résumé

In this dissertation, we investigate the interplay between Supersymmetry and models based on different flavor symmetry groups: A4, S3, A5 and Δ(27). The use of flavor symmetries is the most popular tool for model builders to tackle the Standard Model's flavor puzzle. A plethora of possible choices for the flavor symmetry and its breaking are consistent with the existing flavor data. A well-known problem of the SM is that we can not fully recover the fundamental flavor parameters of the SM Lagrangian, the Yukawa matrices. This problem is especially critical in the neutrino sector, where the Seesaw mechanism entangles the neutrino Yukawa couplings and the right-handed neutrino Majorana masses. Hence, we may never be able to detect which flavor symmetry lies behind the Origin of Flavor. Physics Beyond the Standard Model, which predicts new flavor interactions, like, for example, Supersymmetry, is probably the only opportunity to sort out the flavor puzzle. We show that the combination of bounds over lepton flavor violating processes, especially μ→eγ, can significantly restrict the parameter space of Supersymmetry well beyond direct searches and, at the same time, provide detached testable predictions to be (dis) proven by the upcoming flavor violation searches. For the most promising of these models, we also investigate the possibility of viable Leptogenesis. Finally, we discuss the constraints imposed by the anomalous magnetic moment (g-2)μ, (g-2)e and μ→eγ on the leptonic Yukawa structure and propose a radiative flavon correction to the lepton masses as a possible solution.