Large electron electric dipole moment in minimal flavor violation framework with Majorana neutrinos

Abstract

The latest data from the ACME Collaboration have put a stringent constraint on the electric dipole moment d_e of the electron. Nevertheless, the standard model (SM) prediction for d_e is many orders of magnitude below the new result, making this observable a powerful probe for physics beyond the SM. We carry out a model-independent study of d_e in the SM with right handed neutrinos and its extension with the neutrino seesaw mechanism under the framework of minimal flavor violation. We find that d_e crucially depends on whether neutrinos are Dirac or Majorana particles. In the Majorana case, d_e can reach its experimental bound, and it constrains the scale of minimal flavor violation to be above a few hundred GeV or more. We also explore extra CP-violating sources in the Yukawa couplings of the right-handed neutrinos. Such new sources can have important effects on d_e.

8 pages, 2 figures, revised to match version published in PRD (Rapid Communication)

References in corpus (3)

• Order of Magnitude Smaller Limit on the Electric Dipole Moment of the Electron
• CKM benchmarks for electron EDM experiments
• Supersymmetric models with minimal flavour violation and their running

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• Flavor-Changing Higgs Decays in Grand Unification with Minimal Flavor Violation
• Electric dipole moments of charged leptons at one loop in the presence of massive neutrinos
• Flavor Violating Higgs Couplings in Minimal Flavor Violation