Charged Lepton Electric Dipole Moments from TeV Scale Right-handed Neutrinos

Abstract

We study the connection between charged lepton electric dipole moments, $d_l$ $(l=e,\mu ,\tau )$, and seesaw neutrino mass generation in a simple two Higgs doublet extension of the Standard Model plus three right-handed neutrinos (RHN) $N_a$, $a=1,2,3$. For RHN with hierarchical masses and at least one with mass in the 10 TeV range we obtain the upper bounds of $|d_e|<9\times 10^{-30}$ e-cm and $|d_{\mu }|<2\times 10^{-26}$ e-cm. Our scenario favors the normal mass hierarchy for the light neutrinos. We also calculated the cross section for $e^-e^- \ra W^- W^-$ in a high luminosity collider with constraints from neutrinoless double beta decay of nuclei included. Among the rare muon decay experiments we find that $μ\ra eγ$ is most sensitive and the upper limit is $<8\times 10^{-13}$.

references added, typos corrected

References in corpus (2)

• Enhancement of the electric dipole moment of the electron in PbO
• Quark-Lepton Unification and Lepton Flavor Non-Conservation from a TeV-scale Seesaw Neutrino Mass Texture

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