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Article overview
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Quark level and hadronic contributions to the electric dipole moment of charged leptons in the standard model | | Yasuhiro Yamaguchi
; Nodoka Yamanaka
; | | Date: |
30 May 2020 | | Abstract: | We evaluate the electric dipole moment (EDM) of charged leptons in the
standard model, where the complex phase of the Cabibbo-Kobayashi-Maskawa matrix
is the only source of CP violation. We first prove that, at the quark-gluon
level, it is suppressed by a factor of $m_b^2 m_c^2 m_s^2$ at all orders of
perturbation 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. | | Source: | arXiv, 2006.0281 | | Services: | Forum | Review | PDF | Favorites | |
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