Publication Date:
2011-09-07
Description:
Author(s): M. Aoki, M. Blecher, D. A. Bryman, S. Chen, M. Ding, L. Doria, P. Gumplinger, C. Hurst, A. Hussein, Y. Igarashi, N. Ito, S. H. Kettell, L. Kurchaninov, L. Littenberg, C. Malbrunot, T. Numao, R. Poutissou, A. Sher, T. Sullivan, D. Vavilov, K. Yamada, and M. Yoshida (PIENU Collaboration) Evidence of massive neutrinos in the π + → e + ν decay spectrum was sought with the background π + → μ + → e + decay chain highly suppressed. Upper limits (90% C.L.) on the neutrino mixing matrix element | U e i | 2 in the neutrino mass region 60–129 MeV/ c 2 were set at the level of 10 -8 . [Phys. Rev. D 84, 052002] Published Tue Sep 06, 2011
Keywords:
Experiment
Print ISSN:
0556-2821
Electronic ISSN:
1089-4918
Topics:
Physics
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