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Abada, A.; De Romeri, V.; Monteil, S.; Orloff, J.; Teixeira, A. M.
The journal of high energy physics, 04/2015, Letnik: 2015, Številka: 4Journal Article
A bstract A future high-luminosity Z -factory will offer the possibility to study rare Z decays, as those leading to lepton flavour violating final states. Processes such as Z → ℓ 1 ∓ ℓ 2 ± are potentially complementary to low-energy (high-intensity) observables of lepton flavour violation. In this work we address the impact of new sterile fermions on lepton flavour violating Z decays, focusing on potential searches at FCC-ee (TLEP), and taking into account experimental and observational constraints on the sterile states. We consider a minimal extension of the Standard Model by one sterile fermion state, and two well-motivated frameworks of neutrino mass generation, the Inverse Seesaw embedded into the Standard Model, and the ν MSM. Our study shows that sterile neutrinos can give rise to contributions to BR( Z → ℓ 1 ∓ ℓ 2 ± ) within reach of the FCC-ee. We also discuss the complementarity between a high-luminosity Z -factory and low-energy charged lepton flavour violation facilities.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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