International Conference on Kaon Physics 2019

Results and prospects from the PIENU experiment

12 Sept 2019, 15:20

20m

Aula Magna (University of Perugia (Italy))

Talk Other rare decays

Speaker

Masaharu Aoki (Osaka University)

Description

The PIENU experiment at TRIUMF aims to measure the branching ratio, R_e/μ = Γ(π⁺ → e⁺ν(γ))/Γ(π⁺ → μ⁺ν(γ)), with 0.1% of the precision; providing the most precise test of the lepton universarity. The collaboration collected physics data during 2009--2012, and the result of R_e/μ based on part of the 2010 data was published in 2015. The analysis of the full data set (10⁷ of π⁺ → e⁺ ν decays) with 0.1% precision will be completed soon.

The search for heavy neutrinos in π→eν and π→μν decays were also performed using the high statistics pion-decay data we had accumulated. The results were published in 2018 for π→eν and accepted-for-publication for π→μν.

The result of the heavy neutrinos search and the updated status of the R_e/μ analysis with the full data set will be presented.

Presentation materials

pienu-kaon2019.pdf