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Reevaluation of heavy-fermion-induced electron EDM at three loops
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Reevaluation of heavy-fermion-induced electron EDM at three loops
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Motivated by improved limits on electric dipole moments (EDMs), we revisit the three-loop light-by-light mechanism that transmits $CP$ violation from a heavy fermion to a light one. Applying it to the electron EDM induced by EDMs of heavier flavors, we find additional contributions at the order $ m_e/m_\mu $ or $m_e/m_\tau$ that were missing before and that make the result 1.4 times larger. Consequently we improve bounds on the tau EDM, and update indirect limits on the muon EDM as well as charm and bottom quark color EDMs.
Forward citations
Cited by 3 Pith papers
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Radiative lepton model in a non-invertible fusion rule
A radiative lepton mass model with a Z2-gauged Z5 non-invertible fusion rule can fit neutrino oscillation data and predicts charged-lepton EDMs that indirectly bound 0νββ to ≲28–33.5 meV.
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Probing the imaginary parts and their $q^2$ dependences for the tau $g-2$ and EDM
Explores q² dependence and imaginary parts of tau g-2 and EDM in SMEFT and 2HDM, proposing methods to measure them at Belle II and STCF to improve a_τ bounds by over an order of magnitude.
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Complex $\tau$ Electric Dipole Moment from GeV-Scale New Physics
An axion-like particle coupling induces sizable real and imaginary components in the tau EDM, with values potentially accessible at STCF and Belle II.
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