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

Abstract

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.

5 pages, 6 figures

References in corpus (1)

• Mixing of Active and Sterile Neutrinos

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