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Charged Lepton Electric Dipole Moments from TeV Scale Right-handed Neutrinos
High Energy Physics - Phenomenology · Submitted 16 Nov 2004
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim 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.
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The abstract, sentence by sentence
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 $\mu\ra e\gamma$ is most sensitive and the upper limit is $<8\times 10^{-13}$.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | 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) $N_a$, $a=1,2,3$. | contribution 0.99 | 0.85 | 0.07 | asserted 0.91 |
| s1 | 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. | result 1.00 | 0.92 | 0.38 | asserted 1.00 |
| s2 | Our scenario favors the normal mass hierarchy for the light neutrinos. | interpretation 0.61 | 0.78 | 0.16 | asserted 0.65 |
| s3 | 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. | contribution 0.90 | 0.93 | 0.05 | asserted 1.00 |
| s4 | Among the rare muon decay experiments we find that $\mu\ra e\gamma$ is most sensitive and the upper limit is $<8\times 10^{-13}$. | result 0.99 | 0.91 | 0.08 | asserted 1.00 |
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The paper
Original 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 $\mu\ra e\gamma$ is most sensitive and the upper limit is $<8\times 10^{-13}$.
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4 arXiv papers cite this in 5 sentences
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But we can utilize the sum rule ([ref]) to set a bound [equation] The limit on $|d_e|$, though larger than the four-loop SM result [ref] and the bounds reached via other mechanisms [ref] , is still about three orders of magnitude below the precision reachable in the near future [ref] .
Electric Dipole Moments of Charged Leptons from Their Majorana-type Yukawa Couplings · Approach 1: model independent result · 0.93
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