Improved search for heavy neutrinos in the decay π →eν

(PIENU Collaboration)

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44 Citations (Scopus)


A search for massive neutrinos has been made in the decay π+→e+ν. No evidence was found for extra peaks in the positron energy spectrum indicative of pion decays involving massive neutrinos (π→e+νh). Upper limits (90% C.L.) on the neutrino mixing matrix element |Uei|2 in the neutrino mass region 60-135 MeV/c2 were set and are an order of magnitude improvement over previous results.

Original languageEnglish
Article number074011
JournalPhysical Review D
Issue number7
Publication statusPublished - Apr 1 2018
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)


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