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Flavour and CP violations that the neutrino-seesaw couplings of types I, II,and III induce radiatively in the soft massive parameters of the minimalsupersymmetric SU(5) model, made realistic by nonrenormalizable operators, areanalyzed. Effective couplings are used to parametrize the couplings ofrenormalizable operators and of the corrections that nonrenormalizable onesprovide at the tree level. It is found that for a limited, but sufficientaccuracy in the calculations of such violations, it is possible to extend thepicture of effective couplings to the quantum level, all the way to the cutoffscale. The arbitrariness introduced by nonrenormalizable operators is analyzedin detail. It is shown that it can be drastically reduced in the Yukawa sectorif the effective Yukawa couplings involving colored triplet Higgs bosons aretuned to suppress the decay rate of the proton. In the supersymmetry-breakingsector, the usual requirement of independence of flavour and field type for themechanism of mediation of supersymmetry breaking is not sufficient to forbidarbitrary flavour and CP violations at the tree level. Special conditions to beadded to this requirement, under which such violations can be avoided, areidentified. Depending on how and whether these conditions are implemented,different phenomenological scenarios emerge. Flavour and CP violations of softmassive parameters induced by neutrino-seesaw couplings are discussedexplicitly for the simplest scenario, in which no such violations are presentat the tree level. Guidelines for studying them in other, less simple scenariosare given. Lists of all renormalization group equations needed for theircalculations are provided for each of the three types of seesaw mechanism, atall energies between the TeV scale and Planck scale.

Minimal supersymmetric SU(5) model with nonrenormalizable operators: Seesaw mechanism and violation of flavour and CP