Coherence of neutrino flavor mixing in quantum field theory

Details Coherence of neutrino flavor mixing in quantum field theory Coherence of neutrino flavor mixing in quantum field theory

1999-09-12

arxiv.org/abs/hep-ph/9909332v1

Phys.Rev. D61 (2000) 073006

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.61.073006

In the simplistic quantum mechanical picture of flavor mixing, conditions on the maximum size and minimum coherence time of the source and detector regions for the observation of interference---as well as the very viability of the approach---can only be argued in an ad hoc way from principles external to the formalism itself. To examine these conditions in a more fundamental way, the quantum field theoretical $S$-matrix approach is employed in this paper, without the unrealistic assumption of microscopic stationarity. The fully normalized, time-dependent neutrino flavor mixing event rates presented here automatically reveal the coherence conditions in a natural, self-contained, and physically unambiguous way, while quantitatively describing the transition to their failure.

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