Search for Massive Neutrinos in the Decay pi --> e nu

Details Search for Massive Neutrinos in the Decay pi --> e nu Search for Massive Neutrinos in the Decay pi --> e nu

2011-06-20

arxiv.org/abs/1106.4055v1

Physics

High Energy Physics

High Energy Physics - Experiment

5 pages, 6 figures

Scientific paper

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 |U_ei|^2 in the neutrino mass
region 60--129 MeV/c^2 were set at the level of 10^-8.

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