Initial Results from the PIENU Experiment

Sullivan, T. et al. (2017) Initial Results from the PIENU Experiment. In: XIII International Conference on Heavy Quarks and Leptons (HQL 2016) - Lepton Universality, (doi: 10.22323/1.274.0043)

Abstract

The pion branching ratio, Rπ=Γ(π+→e+νe+π+→e+νeγ)Γ(π+→μ+νμ+π+→μ+νμγ)Rπ=Γ(π+→e+νe+π+→e+νeγ)Γ(π+→μ+νμ+π+→μ+νμγ) , provides a sensitive test of lepton universality and constraints on many new physics scenarios. The theoretical uncertainty on the Standard Model prediction of RπRπ is 0.02%, a factor of twenty smaller than the experimental uncertainty. The analysis of a subset of data taken by the PIENU experiment will be presented. The result, Rπ=(1.2344±0.0023(stat)±0.0019(syst))⋅10−4Rπ=(1.2344±0.0023(stat)±0.0019(syst))⋅10−4, is consistent with the Standard Model prediction and represents a 0.1% constraint on lepton non-universality.

• Item Type: Conference Proceedings
• Additional Information: PoS: Proceedings of Science volume 274
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Protopopescu, Dr Dan and Britton, Professor David
• Authors: Sullivan, T., Aguilar-Arevalo, A., Aoki, M., Blecher, M., Britton, D.I., Bryman, D.A., vom Bruch, D., Chen, S., Comfort, J., Cuen-Rochin, S., Doria, L., Gumplinger, P., Hussein, A., Igarashi, Y., Ito, S., Kettell, S.H., Kurchaninov, L., Littenberg, L.S., Malbrunot, C., Mischke, R.E., Numao, T., Protopopescu, D., Sher, A., and Vavilov, D.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Journal Name: PoS
• Copyright Holders: Copyright © 2017 The Authors
• Publisher Policy: Reproduced under a Creative Commons License

Related URLs

• Other