Neutrino Oscillations and Decoherence

Details Neutrino Oscillations and Decoherence Neutrino Oscillations and Decoherence

2008-10-22

arxiv.org/abs/0810.4132v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

25 pages, 4 figures

Scientific paper

We present an expression for the transition probability between Dirac or Majorana neutrino flavors obtained from first principles within quantum field theory. Our derivation is based on a standard quantum mechanical setup and includes the specific mechanism of neutrino production only in as much as it specifies the initial state. Our expression for the transition probability reproduces the usual formula in the plane wave limit and shows the correct non-relativistic and ultra-relativistic behaviors. It also allows a simple understanding of the decoherence of the oscillations and of the question of the arrival times of the different neutrino mass eigenstates. We show numerical examples for the case of two neutrino generations.

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