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Large long-distance contributions to the electric dipole moments of charged leptons in the standard model

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arxiv 2003.08195 v2 pith:SWU2V6WX submitted 2020-03-18 hep-ph hep-exnucl-th

Yasuhiro Yamaguchi , Nodoka Yamanaka This is my paper · ORCID
classification hep-phhep-exnucl-th
keywords timeschargeddipoleelectrichadronlargeleptonslevel
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abstract

We reevaluate the electric dipole moment (EDM) of charged leptons in the standard model using hadron effective models. We find unexpectedly large EDM generated by the hadron level long-distance effect, $d_e = { 5.8 \times 10^{-40} }$, $d_\mu = { 1.4 \times 10^{-38}}$, and $d_\tau = { -7.3 \times 10^{-38} }$ ecm, with an error bar of 70\%, exceeding the conventionally known four-loop level elementary contribution by several orders of magnitude.

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