Resonant CP violation in rare τ ± decays

Research output: Contribution to journalArticlepeer-review

30 Citations (Scopus)


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
Issue number5
Publication statusPublished - 1 May 2017


  • Beyond Standard Model
  • CP violation
  • Neutrino Physics

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


Dive into the research topics of 'Resonant CP violation in rare τ ± decays'. Together they form a unique fingerprint.

Cite this