Resonant CP violation in rare τ ± decays

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Resumen

In this work, we study the lepton number violating tau decays via intermediate on-shell Majorana neutrinos Nj into two scalar mesons and a lepton τ± → M1 ±Nj → M1 ±M2 ±. We calculate the Branching ratios Br(τ±) and the CP asymmetry (Γ(τ+) − Γ(τ))/(Γ(τ+) + Γ(τ)) for such decays, in a scenario that contains at least two heavy Majorana neutrinos. The results show that the CP asymmetry is small, but becomes comparable with the branching ratio Br(τ±) when their mass difference is similar with their decay width ΔMN ∼ ΓN. We also present regions of the heavy-light neutrino mixing elements, in which the CP asymmetry could be explored in future tau factories.

Idioma originalInglés
Número de artículo110
PublicaciónJournal of High Energy Physics
Volumen2017
N.º5
DOI
EstadoPublicada - 1 may. 2017

Áreas temáticas de ASJC Scopus

  • Física nuclear y de alta energía

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