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Quark level and hadronic contributions to the electric dipole moment of charged leptons in the standard model

Yamaguchi, Yasuhiro  ; Yamanaka, Nodoka*

We evaluate the electric dipole moment (EDM) of charged leptons in the standard model. We first prove that, at the quark-gluon level, it is suppressed due to the GIM mechanism. We then calculate the hadronic long distance contribution generated by vector mesons at one-loop level. The $$|Delta S|$$ = 1 weak hadronic interaction is derived using the factorization, and the strong interaction is modeled by the hidden local symmetry framework. We find that the EDMs of charged leptons obtained from this hadronic mechanism are much larger than the perturbative four-loop level quark-gluon process, by several orders of magnitude.

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Category:Astronomy & Astrophysics

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