Search for Heavy Neutrinos in π+→μ+ν Decay and Status of Lepton Universality Test in the PIENU Experiment

Ito, S. et al. (2021) Search for Heavy Neutrinos in π+→μ+ν Decay and Status of Lepton Universality Test in the PIENU Experiment. In: 3rd J-PARC Symposium (J-PARC2019), Tsukuba, Japan, 23-26 Sep 2019, 011131. ISBN 9784890271467 (doi: 10.7566/jpscp.33.011131)

Abstract

In the present work of the PIENU experiment, heavy neutrinos were sought in pion decays π+→μ+ν. No evidence for extra peak was found in the muon kinetic energy spectrum and 90% confidence level upper limits were set on the neutrino mixing matrix |Uμi|2 in the mass range of 15.7 to 33.8 MeV/c2, improving an order of magnitude over previous experiments. Current status of lepton universality test is also reported.

• Item Type: Conference Proceedings
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Britton, Professor David
• Authors: Ito, S., Aguilar-Arevalo, A., Aoki, M., Blecher, M., Britton, D. I., vom Bruch, D., Bryman, D. A., Chen, S., Comfort, J., Doria, L., Cuen-Rochin, S., Gumplinger, P., Hussein, A., Igarashi, Y., Kettell, S. H., Kurchaninov, L., Littenberg, L. S., Malbrunot, C., Mischke, R. E., Numao, T., Protopopescu, D., Sher, A., Sullivan, T., and Vavilov, D.
• College/School: College of Science and Engineering > School of Physics and Astronomy
• ISSN: 2435-3892
• ISBN: 9784890271467
• Copyright Holders: Copyright © 2021 The Authors
• First Published: First published in Proceedings of the 3rd J-PARC Symposium (J-PARC2019): 011131
• Publisher Policy: Reproduced under a Creative Commons License