Aspects of CP violation in supersymmetric theories
(1985) Nuclear Physics, Section B — Vol. 253, p. 93-115 (1985)
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- We give a comprehensive study of CP-violating effects in low-energy softly broken supersymmetric theories. We find that gluino exchange contributions to CP violation arising from the Kobayashi-Maskawa mixing matrix may provide indirect evidence of supersymmetry at low energy. Indeed, we point out two important departures from the predictions of the standard model: (i) in the kaon system, the experimental value of the var epsilon-parameter cannot be reconciled with a large B-lifetime (τB>10−12s) and light top quark (mtless, approximate50GeV) in the context of the usual three-generation standard model; this is no longer true when the additional supersymmetry contributions to CP violation are included; (ii) in the beon system, the presence of supersymmetry enhances Image mixing as well as off-shell and on-shell CP-violating phenomena making more likely an experimental detection of some of the effects. On the other hand, the electric dipole moment of the neutron due to the Kobayashi-Maskawa phase is still very small and var epsilon′/var epsilon continues to be consistent with the experimental bounds.
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Gérard, J.-M., Grimus, W., Masiero, A., Nanopoulos, D. V., & Raychaudhuri, A. (1985). Aspects of CP violation in supersymmetric theories. Nuclear Physics, Section B, 253, 93-115. https://doi.org/10.1016/0550-3213(85)90521-8 (Original work published 1985)