Structures of expectation values of flavor neutrino charges with respect to neutrino-source hadrons

In the framework of quantum field theory, we examine what physical implications are included in the expectation values of the flavor neutrino charges at the time x0 with respect to the state Ψ(x0), which is taken so as to coincide with the neutrino source state, such as a charged pion at time xI0 (< x0). (author)