Search for heavy neutrinos in π → μν decay

Search for heavy neutrinos in π → μν decay

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 neut...

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Veröffentlicht in:Physics letters. B 2019-11, Vol.798, p.134980, Article 134980
Hauptverfasser: 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., Ito, S., Kettell, S.H., Kurchaninov, L., Littenberg, L.S., Malbrunot, C., Mischke, R.E., Numao, T., Protopopescu, D., Sher, A., Sullivan, T., Vavilov, D.
Format: Artikel
Sprache:eng
Schlagworte:
Heavy neutrino
Pion decay
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Zusammenfassung: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.
ISSN:0370-2693
1873-2445
DOI:10.1016/j.physletb.2019.134980