DO MUONS OSCILLATE

We develop a theory of the EPR-like effects due to neutrino oscillatio ns in the pi --> mu nu decays. Its experimental implications are space -time correlations of the neutrino and muon when they are both detecte d, while the pion decay point is not fixed. However, the more radical possibility of mu-oscillations in experiments where only muons are det ected (as suggested in hep-ph/9509261),is ruled out. We start by discu ssing decays of monochromatic pions, and point out a few ''paradoxes'' Then we consider pion wave packets, solve the ''paradoxes'', and show that the formulas for mu nu correlations can be transformed into the usual expressions, describing neutrino oscillations, as soon as the pi on decay point is fixed. (C) 1997 Elsevier Science B.V.