Search for massive neutrinos in π+→e+νe decay

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. Hussein, Y. Igarashi, S. Kettell, L. Kurchaninov, L. Littenberg, C. Malbrunot, R. E. Mischke, T. NumaoD. Protopopescu, A. Sher, T. Sullivan, D. Vavilov

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


The PIENU experiment aims to measure the branching ratio of the charged pion decay with precision of < 0.1 %. This measurement is much sensitive to search for massive neutrinos coupled to electrons in π+→ e+νe decay. The initial analysis was completed and the upper limit on the neutrino mixing parameter |Uei|2 in the neutrino mass range of 0 to 55 MeV/c2 was improved by a factor of 1.5, and the sensitivity for the mass range of 68 to 129 MeV/c2 was improve by a factor of up to 4.

Original languageEnglish
Article number1
JournalHyperfine Interactions
Issue number1
Publication statusPublished - Nov 1 2017


  • Neutrino mixing
  • Pion decay
  • Precision measurement
  • Weak interaction

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Nuclear and High Energy Physics
  • Condensed Matter Physics
  • Physical and Theoretical Chemistry


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