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Published October 1, 2008 | Published
Journal Article Open

Higgs-Higgsino-gaugino induced two loop electric dipole moments


We compute the complete set of Higgs-mediated chargino-neutralino two-loop contributions to the electric dipole moments of the electron and neutron in the minimal supersymmetric standard model (MSSM). We study the dependence of these contributions on the parameters that govern CP-violation in the MSSM gauge-gaugino-Higgs-Higgsino sector. We find that contributions mediated by the exchange of WH± and ZA0 pairs, where H± and A0 are the charged and CP-odd Higgs scalars, respectively, are comparable to or dominate over those mediated by the exchange of neutral gauge bosons and CP-even Higgs scalars. We also emphasize that the result of this complete set of diagrams is essential for the full quantitative study of a number of phenomenological issues, such as electric dipole moment searches and their implications for electroweak baryogenesis.

Additional Information

© 2008 The American Physical Society. (Received 9 July 2008; revised 4 September 2008; published 10 October 2008) We thank G. Giuidice and A. Romanino for helpful discussions regarding the results for the Zh0 contributions. This work was supported in part under U.S. Department of Energy Contract No. DE-FG02-08ER41531 (Y.L. and M.J.R.M.) and the University of Wisconsin Alumni Research Foundation (Y.L. and M.J.R.M.), and by a Faculty Research Grant from the University of California, Santa Cruz (S.P.).

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