Lepton number violating effects in neutrino oscillations

Details Lepton number violating effects in neutrino oscillations Lepton number violating effects in neutrino oscillations

2011-12-07

arxiv.org/abs/1112.1523v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, LaTeX, no figure

Scientific paper

We develop a non-adiabatic perturbation theory for oscillations involving an arbitrary number of neutrino and antineutrino species, including the possibility of lepton number violation which we treat as a small effect. We interpret the physics of such an approach for the one generation case by introducing the notion of adiabaticity for neutrino and antineutrino oscillations in analogy to flavor oscillations. We find that in a CP-odd matter environment a small lepton number violation in vacuo can be enhanced. Eventually, we apply the perturbation theory to the two generation case and work out an example for manifestations of lepton number violation, which can be solved both perturbatively as well as analytically thereby further clarifying the nature of the perturbation expansion.

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