Radiative Neutrino Decay in Media

Details Radiative Neutrino Decay in Media Radiative Neutrino Decay in Media

1998-08-24

arxiv.org/abs/hep-ph/9808390v1

Phys.Rev. D60 (1999) 053010

Physics

High Energy Physics

High Energy Physics - Phenomenology

11 pages, 3 encapsulated figures

Scientific paper

10.1103/PhysRevD.60.053010

In this letter we introduce a new method to determine the radiative neutrino decay rate in the presence of a medium. Our approach is based on the generalisation of the optical theorem at finite temperature and density. Differently from previous works on this subject, our method allows to account for dispersive and dissipative electromagnetic properties of the medium. Some inconsistencies that are present in the literature are pointed-out and corrected here. We shortly discuss the relevance of our results for neutrino evolution in the early universe.

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