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Status of the TRIUMF PIENU Experiment

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arxiv 1509.08437 v3 pith:MCJPDUWF submitted 2015-09-28 physics.ins-det hep-ex

Status of the TRIUMF PIENU Experiment

S. Ito , A. Aguilar-Arevalo , M. Aoki , M. Blecher , D.I. Britton , D.A. Bryman , D. vom Bruch , S. Chen
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J. Comfort S. Cuen-Rochin L. Doria P. Gumplinger A. Hussein Y. Igarashi S. Kettell L. Kurchaninov L. Littenberg C. Malbrunot R.E. Mischke T. Numao D. Protopopescu A. Sher T. Sullivan D. Vavilov
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classification physics.ins-det hep-ex
keywords gammaexperimentpienurightarrowstatustriumfaimsbranching
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The PIENU experiment at TRIUMF aims to measure the pion decay branching ratio $R={\Gamma}({\pi}^+{\rightarrow}e^+{\nu}_e({\gamma}))/{\Gamma}({\pi}^+{\rightarrow}{\mu}^+{\nu}_{\mu}({\gamma}))$ with precision $<0.1$% to provide a sensitive test of electron-muon universality in weak interactions. The current status of the PIENU experiment is presented.

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