Resonant CP violation in rare τ ± decays

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30 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number110
JournalJournal of High Energy Physics
Volume2017
Issue number5
DOIs
Publication statusPublished - 1 May 2017

Keywords

  • Beyond Standard Model
  • CP violation
  • Neutrino Physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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