Physics Letters B (Nov 2019)
Search for heavy neutrinos in π → μν decay
- 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,
- D. Vavilov
Affiliations
- A. Aguilar-Arevalo
- Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de Mexico, D.F. 04510, Mexico
- M. Aoki
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
- M. Blecher
- Physics Department, Virginia Tech., Blacksburg, VA 24061, USA
- D.I. Britton
- School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- D. vom Bruch
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1, Canada
- D.A. Bryman
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1, Canada; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- S. Chen
- Department of Engineering Physics, Tsinghua University, Beijing, 100084, China
- J. Comfort
- Physics Department, Arizona State University, Tempe, AZ 85287, USA
- L. Doria
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- S. Cuen-Rochin
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1, Canada; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- P. Gumplinger
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- A. Hussein
- University of Northern British Columbia, Prince George, British Columbia, V2N 4Z9, Canada; TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- Y. Igarashi
- KEK, 1-1 Oho, Tsukuba-shi, Ibaraki 305-0801, Japan
- S. Ito
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan; Corresponding authors.
- S.H. Kettell
- Brookhaven National Laboratory, Upton, NY 11973-5000, USA
- L. Kurchaninov
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- L.S. Littenberg
- Brookhaven National Laboratory, Upton, NY 11973-5000, USA
- C. Malbrunot
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1, Canada
- R.E. Mischke
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- T. Numao
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada; Corresponding authors.
- D. Protopopescu
- School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK
- A. Sher
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- T. Sullivan
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia, V6T 1Z1, Canada
- D. Vavilov
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada
- Journal volume & issue
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Vol. 798
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
