Search for a 33.9 MeV/c(2) neutral particle in pion decay.
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Formaggio JA, et al. Among authors: case s.
Phys Rev Lett. 2000 May 1;84(18):4043-6. doi: 10.1103/PhysRevLett.84.4043.
Phys Rev Lett. 2000.
PMID: 10990606