Precision Measurement of the $\pi$$^+$$\rightarrow$$e^+$$\nu$$_e$ Branching Ratio in the PIENU Experiment

Ito, Shintaro; Aguilar-Arevalo, A; Aoki, M.; Blecher, M.; I. Britton, D; A. Bryman, D; vom Bruch, D; Chen, S.; Comfort, J.; Cuen-Rochin, S; Doria, L.; Gumplinger, P.; Husseina, A.; Igarashi, Y.; Kettell., S.; Kurchaninov, L.; Littenberg, L.; Malbrunot, C.; E. Mischke, R; Numao, T.; Protopopescu, D.; Sher, A.; Sullivan, T.; Vavilov, D.

doi:10.22323/1.294.0034

Volume 294 - The 3rd International Symposium on “Quest for the Origin of Particles and the Universe" (KMI2017) - Poster Presentations

Precision Measurement of the $\pi$$^+$$\rightarrow$$e^+$$\nu$$_e$ Branching Ratio in the PIENU Experiment

S. Ito*, A. Aguilar-Arevalo, M. Aoki, M. Blecher, D. I. Britton, D. A. Bryman, D. vom Bruch, S. Chen, J. Comfort, S. Cuen-Rochin, L. Doria, P. Gumplinger, A. Husseina, Y. Igarashi, S. Kettell., L. Kurchaninov, L. Littenberg, C. Malbrunot, R. E. Mischke, T. Numao, D. Protopopescu, A. Sher, T. Sullivan and D. Vavilov

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Pre-published on: November 22, 2017

Published on: November 24, 2017

Abstract

The PIENU experiment at TRIUMF aims to measure the branching ratio of the pion decay modes $R^{\pi}=[{\pi}^+{\rightarrow}e^+{\nu}_e({\gamma})]/[{\pi}^+{\rightarrow}{\mu}^+{\nu}_{\mu}({\gamma})]$ with precision of $<0.1\%$.
Precise measurement of $R^{\pi}$ provides a stringent test of electron-muon universality in weak interactions. The current status of the PIENU experiment and future prospects are presented.

DOI: https://doi.org/10.22323/1.294.0034

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