The PIENU Experiment: Precision tests of the Standard Model and Beyond
ORAL
Abstract
The PIENU experiment includes both a precision test of the Standard Model and probes of BSM physics. The primary goal of the PIENU experiment is a measurement of the branching ratio for π → eν(γ) / π → μν(γ), which is one of the most precisely calculated weak interaction Standard Model observables involving quarks. Measurement of the branching ratio provides a sensitive test of lepton universality and tight constraints on many new physics scenarios with mass reach up to 1000 TeV. A result based on 10% of the data has been published, and the full analysis is nearing completion. The status of the analysis will be presented. In addition, aspects of the full PIENU dataset that probe BSM physics will be summarized.
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Publication: 1 Improved Measurement of the π → eν Branching Ratio, Phys. Rev. Lett. 115 071801 (2015).
2 Improved search for heavy neutrinos in the decay π → eν, Phys. Rev. D97, 072012 (2018).
3 Search for heavy neutrinos in π→μνdecay, Phys.Lett.B 798, 134980 (2019).
4 Improved search for two body muon decay μ+ → e +XH, Phys.Rev.D 101 5, 052014 (2020).
5 Search for the rare decays π+ → μ+ νμν¯ν and π+ → e + νeν, Phys.Rev.D 102 1, 012001(2020).
6 Search for three body pion decays π+ → l + νX, Phys.Rev.D 103, 5, 052006 (2021).
Presenters
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Richard E Mischke
- TRIUMF