Abstract
By resorting to recent results on the relativistic currents for mixed (flavor) fields, we calculate a space-time dependent neutrino oscillation formula in quantum field theory. Our formulation provides an alternative to existing approaches for the derivation of space dependent oscillation formulas and it also accounts for the corrections due to the nontrivial nature of the flavor vacuum. By exploring different limits of our formula, we recover already known results. We study in detail the case of one-dimensional propagation with Gaussian wave packets both in the relativistic and in the nonrelativistic regions: in the last case, numerical evaluations of our result show significant deviations from the standard formula.
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