# Do neutrinos 'become' other types of particles between oscillations?

In light of the recent kurfuffle of FTL neutrinos I wonder, do neutrinos 'become' other particles between their oscillations between the different flavors of neutrino? I'm slightly familiar with Feynman diagrams and wonder if there's some state between, say, electron and muon neutrino that may account for a neutrino's apparent FTL properties over a short distance, but would be averaged away over longer distances.

In short is the transition from electron -> muon -> tau neutrino more like electron neutrino -> (tachyon) -> muon neutrino -> (slower particle) -> tau neutrino?

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Side note: oscillation does not imply a well defined sequence of flavors as you write above. The proper way to think of this is $\nu_\text{created flavor} \to \text{time dependent linear combination of } \nu_1, \nu_2, \nu_3 \to \nu_\text{detected flavor}$ where the $\nu_i$'s are the mass states. – dmckee Oct 1 '11 at 16:52