paper

Electric dipole moments from Yukawa phases in supersymmetric theories

arXiv:hep-ph/9610485 · doi:10.1016/S0550-3213(97)00060-6

Abstract

We study quark and electron EDMs generated by Yukawa couplings in supersymmetric models with different gauge groups, using the EDM properties under flavour transformations. In the MSSM (or if soft terms are mediated below the unification scale) the one loop contributions to the neutron EDM are smaller than in previous computations based on numerical methods, although increasing as tan^3β. A neutron EDM close to the experimental limits can be generated in SU(5), if tanβis large, through the u-quark EDM d_u, proportional to tan^4β. This effect has to be taken into account also in SO(10) with large tanβ, where d_u is comparable to the d-quark EDM, proportional to tanβ.

14 pages, figures included, PS-file also available at http://www.ft.uam.es/~strumia/14Art/14Art.html

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