Search for massive neutrinos in the decay pi -> e nu

Date
2011-09-06Author
Aoki, M.
Blecher, M.
Bryman, D. A.
Chen, S.
Ding, M.
Doria, L.
Gumplinger, P.
Hurst, C.
Hussein, A.
Igarashi, Y.
Ito, N.
Kettell, S. H.
Kurchaninov, L.
Littenberg, L.
Malbrunot, C.
Numao, T.
Poutissou, R.
Sher, A.
Sullivan, T.
Vavilov, D.
Yamada, K.
Yoshida, M.
Pienu Collaboration
Metadata
Show full item recordAbstract
Evidence of massive neutrinos in the pi(+) -> e(+)nu decay spectrum was sought with the background pi(+) -> mu(+) -> e(+) decay chain highly suppressed. Upper limits (90% C. L.) on the neutrino mixing matrix element vertical bar U(ei)vertical bar(2) in the neutrino mass region 60-129 MeV/c(2) were set at the level of 10(-8).