1. Search for heavy neutrinos in π → μν decay
- Author
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A. Aguilar-Arevalo, M. Aoki, M. Blecher, D.I. Britton, D. vom Bruch, D.A. Bryman, S. Chen, J. Comfort, L. Doria, S. Cuen-Rochin, P. Gumplinger, A. Hussein, Y. Igarashi, S. Ito, S.H. Kettell, L. Kurchaninov, L.S. Littenberg, C. Malbrunot, R.E. Mischke, T. Numao, D. Protopopescu, A. Sher, T. Sullivan, and D. Vavilov
- Subjects
Physics ,QC1-999 - Abstract
In the present work of the PIENU experiment, heavy neutrinos were sought in pion decays π+→μ+ν at rest by examining the observed muon energy spectrum for extra peaks in addition to the expected peak for a light neutrino. No evidence for heavy neutrinos was observed. Upper limits were set on the neutrino mixing matrix |Uμi|2 in the neutrino mass region of 15.7–33.8 MeV/c2, improving on previous results by an order of magnitude. Keywords: Pion decay, Heavy neutrino
- Published
- 2019
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