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Charged Lepton Flavour Violation from Massive Neutrinos in Z Decays
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Present evidences for neutrino masses and lepton flavour mixings allow to predict, in the Standard Model with light neutrinos, branching rates for the decays Z --> e mu, mu tau, e tau of less than 10^{-54}, while present experimental exclusion limits from LEP 1 are of order 10^{-5}. The GigaZ option of the TESLA Linear Collider project will extend the sensitivity down to about 10^{-8}. We study in a systematic way some minimal extensions of the Standard Model and show that GigaZ might well be sensitive to the rates predicted from these scenarios.
Forward citations
Cited by 3 Pith papers
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Taming flavour violation in the Inverse Seesaw
New eta-based parametrisations of the ISS(3,3) show that Z-penguin flavour violation can reveal non-degenerate heavy sterile mixing even when radiative decays are absent.
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High-energy cLFV at $\mu$TRISTAN: HNL extensions of the Standard Model
In HNL extensions of the Standard Model, mu+e- collisions at muTRISTAN could discover e-tau and mu-tau charged lepton flavour violation with sensitivity orders of magnitude beyond low-energy experiments and FCC-ee.
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Revisiting lepton flavor violation: $\tau$ and meson decays
Updated type-I seesaw analysis shows semileptonic tau decays like tau to lepton rho can dominate cLFV signals and some branching ratios may reach next-generation experiment sensitivity.
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