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Indirect searches for sterile neutrinos at a high-luminosity Z-factory

Abada, A. ; De Romeri, V. ; Monteil, S. ; Orloff, J. ; Teixeira, A. M.

The journal of high energy physics, 2015-04, Vol.2015 (4), p.1, Article 51 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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  • Título:
    Indirect searches for sterile neutrinos at a high-luminosity Z-factory
  • Autor: Abada, A. ; De Romeri, V. ; Monteil, S. ; Orloff, J. ; Teixeira, A. M.
  • Assuntos: Classical and Quantum Gravitation ; Elementary Particles ; Physics ; Physics and Astronomy ; Quantum Field Theories ; Quantum Field Theory ; Quantum Physics ; Regular Article - Theoretical Physics ; Relativity Theory ; String Theory
  • É parte de: The journal of high energy physics, 2015-04, Vol.2015 (4), p.1, Article 51
  • Descrição: 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.
  • Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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