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Is there a puzzle in the pi /sup 0/ rarr /b e//sup +/ /b e//sup -/ decay?

Bibliographic reference Lambin, M. ; Pestieau, Jean. Is there a puzzle in the pi /sup 0/ rarr /b e//sup +/ /b e//sup -/ decay?. In: Zeitschrift fuer Physik C. Particles and Fields, Vol. 32, no. 3, p. 441-443 (1986)
Permanent URL http://hdl.handle.net/2078.1/66382