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+ | ====== TTP09-04 EDM constraints on flavored CP-violating phases ====== | ||

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+ | <hidden TTP09-04 EDM constraints on flavored CP-violating phases > The CP-violating phenomenology of the MSSM with Minimal Flavor Violation (MFV) | ||

+ | in the lepton sector is revisited. To this end, the most general | ||

+ | parametrizations of the slepton soft-breaking terms are constructed assuming a | ||

+ | seesaw mechanism of type I. After a critical reassessment of how the | ||

+ | CP-symmetry is broken within the MFV framework, all possible CP-violating | ||

+ | phases are introduced. From the strong hierarchy of their contributions to the | ||

+ | Electric Dipole Moments (EDMs), these phases are split into three classes: | ||

+ | flavor-blind, flavor-diagonal and flavor off-diagonal. In particular, the | ||

+ | phases from the neutrino sector belong to the last class; they start to | ||

+ | contribute only at the second order in the mass-insertion approximation and | ||

+ | have thus a negligible effect. It is then shown that to each class of phases | ||

+ | corresponds a unique largely dominant term in the MFV expansion. Numerically, | ||

+ | for a realistic range of MSSM and neutrino parameters, such that B(mu --> e | ||

+ | gamma) does not exceed its experimental bound, the three types of phases are | ||

+ | found to be allowed by the current bound on the electron EDM, though the next | ||

+ | generation of experiments should constrain tightly the flavor-blind | ||

+ | phase. Finally, we relax the MFV hypothesis and show how in the general MSSM, | ||

+ | the MFV operator basis can be used to judge of the naturality of the slepton | ||

+ | soft-breaking terms. | ||

+ | </hidden> | ||

+ | |**Mercolli, Lorenzo and Smith, Christopher** | | ||

+ | |** Nucl.Phys. B817 1-24 2009 ** | | ||

+ | | {{preprints:2009:ttp09-04.pdf|PDF}} {{preprints:2009:ttp09-04.ps|PostScript}} [[http://arxiv.org/abs/0902.1949|arXiv]] | | ||

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