Fermion EDMs with Minimal Flavor Violation

Abstract

We study the electric dipole moments (EDMs) of fermions in the standard model supplemented with right-handed neutrinos and its extension including neutrino seesaw mechanism under the framework of minimal flavor violation (MFV). In the quark sector, we find that the current experimental bound on the neutron EDM does not yield a significant restriction on the scale of MFV. In addition, we consider how MFV may affect the contribution of the strong theta-term to the neutron EDM. For the leptons, the existing EDM data also do not lead to strict limits if neutrinos are Dirac particles. On the other hand, if neutrinos are Majorana in nature, we find that the constraints become substantially stronger. Moreover, the results of the latest search for the electron EDM by the ACME Collaboration are sensitive to the MFV scale of order a few hundred GeV or higher. We also look at constraints from $CP$-violating electron-nucleon interactions that have been probed in atomic and molecular EDM searches.

27 pages, 6 figures. New materials added

References in corpus (9)

• Improved limit on the permanent electric dipole moment of 199Hg
• Limit on Neutrinoless ββ Decay of Xe-136 from the First Phase of KamLAND-Zen and Comparison with the Positive Claim in Ge-76
• NNLO QCD corrections to the B -> X_s gamma matrix elements using interpolation in m_c
• General Minimal Flavor Violation
• Supersymmetric models with minimal flavour violation and their running
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Signs of neutrino mass in current cosmological datasets
• Various definitions of Minimal Flavour Violation for Leptons
• CP violation and Leptogenesis in models with Minimal Lepton Flavour Violation
• Leptonic CP Violation and Leptogenesis

Cited by in corpus (1)

• Seesaw Models with Minimal Flavor Violation